Zone Forecast Product
Issued by NWS Phoenix, AZ
Issued by NWS Phoenix, AZ
827 FPUS55 KPSR 181846 ZFPPSR Zone Forecast Product for Southwest Arizona/Southeast California National Weather Service Phoenix AZ 1146 AM MST Tue Aug 18 2026 This is an automatically generated product that provides average values for large geographical areas and may not be representative of the exact location that you are interested in. For a more site specific forecast, please visit weather.gov/phoenix and either (1) Select a location from the dropdown menu above the map or (2) Click a location on the map. You can refine your selection by clicking on the map displayed on the resulting page. AZZ537-540-542>544-546-548-550-551-182300- Northwest Valley-Buckeye/Avondale-Deer Valley-Central Phoenix- North Phoenix/Glendale-Scottsdale/Paradise Valley-East Valley- South Mountain/Ahwatukee-Southeast Valley/Queen Creek- Including the cities of Circle City, Surprise, Wittmann, Beardsley, Sun City West, Avondale, Cashion, Goodyear, Liberty, Peoria, Phoenix, Paradise Valley, Mesa, Chandler, Tempe, Gilbert, Sun Lakes, and Queen Creek 1146 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TODAY...Sunny and hot. Highs 107 to 111. Southeast wind 5 to 10 mph in the morning becoming southwest in the afternoon. .TONIGHT...Mostly clear. Lows 82 to 90. West wind 5 to 10 mph in the evening becoming southwest 10 to 20 mph after midnight. .WEDNESDAY...Mostly sunny and hot. Highs 106 to 110. West wind 5 to 15 mph. .WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows 83 to 90. Southwest wind 5 to 15 mph. Chance of rain 20 percent. .THURSDAY...Partly sunny. Highs 105 to 109. Southwest wind 5 to 10 mph. .THURSDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 81 to 87. .FRIDAY...Partly cloudy in the morning then becoming mostly sunny. Hot. Highs 106 to 111. .FRIDAY NIGHT...Partly cloudy. Lows 83 to 90. .SATURDAY...Partly sunny and hot. Highs 107 to 112. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 82 to 88. .SUNDAY...Partly cloudy. A 10 percent chance of showers and thunderstorms in the morning. Highs 104 to 109. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 81 to 87. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 103 to 108. $$ AZZ541-549-555-182300- Cave Creek/New River-Fountain Hills/East Mesa- Apache Junction/Gold Canyon- Including the cities of Scottsdale, Fountain Hills, and Apache Junction 1146 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TODAY...Sunny and hot. Highs 105 to 110. Southeast wind 10 to 15 mph in the morning becoming southwest 5 to 10 mph in the afternoon. .TONIGHT...Mostly clear. Lows 77 to 87. Northeast wind 5 to 10 mph in the evening becoming southeast after midnight. .WEDNESDAY...Mostly sunny. Highs 104 to 109. West wind 5 to 15 mph. .WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows 76 to 86. South wind 10 to 15 mph in the evening becoming east 5 to 10 mph after midnight. Chance of rain 10 percent. .THURSDAY...Mostly sunny. Highs 103 to 108. Southwest wind 5 to 10 mph. .THURSDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 79 to 84. .FRIDAY...Partly sunny and hot. Highs 104 to 110. .FRIDAY NIGHT...Partly cloudy. Lows 80 to 86. .SATURDAY...Partly sunny and hot. Highs 105 to 111. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 79 to 85. .SUNDAY...Partly sunny. Highs 103 to 109. .SUNDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 79 to 85. .MONDAY...Partly sunny. Highs 101 to 107. $$ AZZ553-554-182300- Northwest Pinal County-West Pinal County- Including the cities of Casa Grande, Cactus Forest, Florence, and Coolidge 1146 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TODAY...Sunny and hot. Highs 106 to 111. South wind 10 to 15 mph in the morning becoming west 5 to 10 mph in the afternoon. .TONIGHT...Mostly clear. Lows 78 to 88. Northwest wind 10 to 15 mph in the evening becoming southwest after midnight. .WEDNESDAY...Mostly sunny and hot. Highs 105 to 110. West wind 5 to 10 mph. .WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows 78 to 88. Southwest wind 10 to 15 mph in the evening becoming south 5 to 10 mph after midnight. Chance of rain 10 percent. .THURSDAY...Partly sunny in the morning then becoming mostly sunny. Hot. Highs 105 to 110. Southwest wind 5 to 10 mph in the morning becoming northwest in the afternoon. .THURSDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 78 to 86. .FRIDAY...Partly sunny and hot. Highs 105 to 111. .FRIDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 79 to 87. .SATURDAY...Partly sunny and hot. Highs 106 to 112. .SATURDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms in the evening, then a slight chance of showers and thunderstorms after midnight. Lows 79 to 86. Chance of rain 30 percent. .SUNDAY...Partly sunny with a 10 percent chance of showers and thunderstorms. Highs 103 to 109. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 79 to 86. .MONDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 102 to 108. $$ AZZ532-182300- Yuma- Including the cities of Yuma and Fortuna Foothills 1146 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TODAY...Sunny and hot. Highs near 112. South wind 10 to 15 mph. .TONIGHT...Mostly clear in the evening then becoming partly cloudy. Breezy. Lows 84 to 86. South wind 10 to 20 mph. Gusts up to 30 mph after midnight. .WEDNESDAY...Partly sunny in the morning then becoming sunny. Breezy. Highs near 109. South wind 10 to 20 mph. Gusts up to 30 mph in the morning. .WEDNESDAY NIGHT...Mostly clear in the evening then becoming partly cloudy. Breezy. Lows 85 to 86. South wind 10 to 15 mph. Gusts up to 30 mph after midnight. .THURSDAY...Mostly sunny and hot. Highs near 110. South wind 10 to 15 mph. .THURSDAY NIGHT...Partly cloudy. Lows in the mid to upper 80s. .FRIDAY...Partly sunny and hot. Highs 110 to 112. .FRIDAY NIGHT...Mostly clear. Lows in the mid to upper 80s. .SATURDAY...Partly sunny and hot. Highs 111 to 113. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the mid to upper 80s. Chance of rain 20 percent. .SUNDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 107 to 111. .SUNDAY NIGHT...Mostly clear. A 10 percent chance of showers and thunderstorms in the evening. Lows in the mid to upper 80s. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 106 to 109. $$ AZZ562-182300- Globe/Miami- Including the cities of Globe and Miami 1146 AM MST Tue Aug 18 2026 .TODAY...Sunny. Highs 93 to 103. East wind 10 to 15 mph. .TONIGHT...Partly cloudy. Lows 68 to 78. North wind 5 to 10 mph in the evening becoming west after midnight. .WEDNESDAY...Mostly sunny. Highs 92 to 102. West wind 5 to 10 mph in the morning becoming northwest 10 to 20 mph in the afternoon. .WEDNESDAY NIGHT...Considerable cloudiness with a slight chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows 67 to 77. Southeast wind 10 to 15 mph in the evening becoming northwest 5 to 10 mph after midnight. Chance of rain 10 percent. .THURSDAY...Partly sunny. A slight chance of afternoon showers and thunderstorms. Highs 92 to 102. West wind 5 to 10 mph. Chance of rain 20 percent. .THURSDAY NIGHT...Considerable cloudiness. A 30 percent chance of showers and thunderstorms in the evening. Lows in the lower to mid 70s. .FRIDAY...Mostly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 98 to 102. .FRIDAY NIGHT...Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows in the mid to upper 70s. .SATURDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 98 to 104. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the mid 70s. .SUNDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 97 to 101. .SUNDAY NIGHT...Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows in the mid to upper 70s. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 96 to 100. $$ AZZ545-547-552-556>558-561-182300- New River Mesa-Rio Verde/Salt River-Superior-Tonto Basin- Mazatzal Mountains-Pinal/Superstition Mountains-Dripping Springs- Including the cities of Tortilla Flat, Superior, Punkin Center, Sunflower, Hayden, and Winkelman 1146 AM MST Tue Aug 18 2026 .TODAY...Sunny. Highs 104 to 109. Southeast wind 5 to 10 mph in the morning becoming southwest 10 to 15 mph in the afternoon. .TONIGHT...Mostly clear. Lows 75 to 85. Northeast wind 5 to 10 mph in the evening becoming southeast after midnight. .WEDNESDAY...Mostly sunny. Highs 103 to 108. Southwest wind 5 to 10 mph in the morning becoming west 10 to 20 mph in the afternoon. .WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows 75 to 85. Northeast wind 5 to 15 mph. Chance of rain 10 percent. .THURSDAY...Partly sunny. A slight chance of afternoon showers and thunderstorms. Highs 102 to 107. West wind 5 to 15 mph. Chance of rain 10 percent. .THURSDAY NIGHT...Considerable cloudiness. A chance of showers and a slight chance of thunderstorms in the evening. Lows 68 to 83. Chance of rain 30 percent. .FRIDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 92 to 108. .FRIDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 69 to 84. .SATURDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 93 to 109. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 69 to 84. .SUNDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 91 to 107. .SUNDAY NIGHT...Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows 69 to 83. .MONDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 90 to 106. $$ AZZ560-182300- San Carlos- Including the cities of San Carlos and Peridot 1146 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TODAY...Sunny. Highs 97 to 107. East wind 5 to 15 mph. .TONIGHT...Partly cloudy. Lows 69 to 79. North wind 10 to 15 mph in the evening becoming west 5 to 10 mph after midnight. .WEDNESDAY...Mostly sunny in the morning, then partly sunny with a chance of afternoon showers and thunderstorms. Highs 97 to 107. West wind 5 to 10 mph in the morning increasing to 10 to 20 mph in the afternoon. Chance of rain 30 percent. .WEDNESDAY NIGHT...Considerable cloudiness with a chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows 69 to 79. Northwest wind 5 to 15 mph. Chance of rain 30 percent. .THURSDAY...Partly cloudy. A slight chance of afternoon showers and thunderstorms. Highs 97 to 107. West wind 5 to 15 mph. Chance of rain 20 percent. .THURSDAY NIGHT...Considerable cloudiness. A chance of showers and a slight chance of thunderstorms in the evening. Lows in the mid to upper 70s. Chance of rain 30 percent. .FRIDAY...Mostly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 101 to 107. .FRIDAY NIGHT...Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows in the mid to upper 70s. .SATURDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 102 to 108. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the mid to upper 70s. .SUNDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 100 to 106. .SUNDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows in the mid to upper 70s. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 100 to 106. $$ AZZ563-182300- Southeast Gila County- 1146 AM MST Tue Aug 18 2026 .TODAY...Sunny in the morning, then partly sunny with a slight chance of afternoon showers and thunderstorms. Highs 90 to 100. Southeast wind 5 to 15 mph. Chance of rain 10 percent. .TONIGHT...Partly cloudy. Lows 68 to 78. Northeast wind 10 to 15 mph in the evening becoming southeast 5 to 10 mph after midnight. .WEDNESDAY...Mostly sunny in the morning, then partly cloudy with a chance of afternoon showers and thunderstorms. Highs 91 to 101. West wind 5 to 15 mph. Chance of rain 30 percent. .WEDNESDAY NIGHT...Considerable cloudiness with a slight chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows 67 to 77. Northeast wind 5 to 15 mph. Chance of rain 10 percent. .THURSDAY...Partly sunny in the morning, then considerable cloudiness with a chance of afternoon showers and thunderstorms. Highs 90 to 100. North wind 5 to 10 mph in the morning becoming west in the afternoon. Chance of rain 30 percent. .THURSDAY NIGHT...Considerable cloudiness. A 20 percent chance of showers and thunderstorms in the evening. Lows 58 to 76. .FRIDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 89 to 101. .FRIDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 59 to 77. .SATURDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 89 to 101. .SATURDAY NIGHT...Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows 59 to 77. .SUNDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 88 to 100. .SUNDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 59 to 77. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 89 to 99. $$ AZZ539-559-182300- Gila Bend-Sonoran Desert Natl Monument- Including the cities of Gila Bend, Sentinel, and Kaka 1146 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TODAY...Sunny and hot. Highs 108 to 113. Southwest wind 5 to 15 mph. .TONIGHT...Mostly clear. Lows 79 to 89. Southwest wind 10 to 20 mph. .WEDNESDAY...Mostly sunny and hot. Highs 106 to 111. Southwest wind 10 to 15 mph in the morning becoming west 5 to 10 mph in the afternoon. .WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows 78 to 88. Southwest wind 5 to 15 mph. Chance of rain 10 percent. .THURSDAY...Partly sunny in the morning, then mostly sunny with a slight chance of afternoon showers and thunderstorms. Hot. Highs 106 to 111. Southwest wind 5 to 10 mph. Chance of rain 10 percent. .THURSDAY NIGHT...Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows 80 to 88. .FRIDAY...Partly sunny and hot. Highs 104 to 112. .FRIDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 81 to 89. .SATURDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Hot. Highs 104 to 113. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 80 to 88. .SUNDAY...Partly sunny with a 10 percent chance of showers and thunderstorms. Hot. Highs 102 to 110. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 79 to 87. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 100 to 108. $$ AZZ534-538-182300- Aguila Valley-Tonopah Desert- Including the cities of Aguila, Gladden, Wickenburg, Arlington, Hassayampa, Tonopah, and Wintersburg 1146 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TODAY...Sunny and hot. Highs 108 to 113. Southeast wind 5 to 10 mph in the morning becoming southwest in the afternoon. .TONIGHT...Mostly clear in the evening then becoming partly cloudy. Breezy. Lows 77 to 87. Southwest wind 10 to 20 mph. Gusts up to 30 mph after midnight. .WEDNESDAY...Mostly sunny and hot. Highs 106 to 111. Southwest wind 5 to 10 mph. .WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows 77 to 87. West wind 5 to 15 mph. Chance of rain 10 percent. .THURSDAY...Partly sunny and hot. Highs 106 to 111. Southwest wind 5 to 10 mph. .THURSDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 79 to 87. .FRIDAY...Partly sunny. Hot. Highs 103 to 112. .FRIDAY NIGHT...Partly cloudy. Lows 80 to 88. .SATURDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 104 to 112. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 78 to 86. .SUNDAY...Partly sunny with a 10 percent chance of showers and thunderstorms. Highs 101 to 109. .SUNDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 78 to 86. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 100 to 108. $$ AZZ531-533-182300- Kofa-Central La Paz- Including the cities of Palm Canyon, Brenda, Harcuvar, Quartzsite, Vicksburg, Vicksburg Junction, and Salome 1146 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TODAY...Sunny and hot. Highs 108 to 113. South wind 5 to 10 mph. .TONIGHT...Partly cloudy. Lows 77 to 87. Southwest wind 10 to 15 mph. .WEDNESDAY...Mostly sunny and hot. Highs 106 to 111. Southwest wind 5 to 10 mph. .WEDNESDAY NIGHT...Partly cloudy. Lows 77 to 87. Southwest wind 5 to 15 mph. .THURSDAY...Mostly sunny and hot. Highs 106 to 111. Southeast wind 5 to 10 mph in the morning becoming southwest in the afternoon. .THURSDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 79 to 87. .FRIDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 103 to 111. .FRIDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 80 to 88. .SATURDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 104 to 112. .SATURDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 79 to 87. .SUNDAY...Partly cloudy. A slight chance of showers in the morning, then a slight chance of afternoon showers and thunderstorms. Highs 101 to 109. Chance of rain 10 percent. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 78 to 86. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Highs 99 to 107. $$ AZZ535-536-182300- Southeast Yuma County-Gila River Valley- Including the city of Ligurta 1146 AM MST Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST FRIDAY... .TODAY...Sunny and hot. Highs 108 to 113. South wind 5 to 15 mph. .TONIGHT...Partly cloudy and breezy. Lows 77 to 87. South wind 10 to 20 mph. Gusts up to 30 mph after midnight. .WEDNESDAY...Mostly sunny, breezy and hot. Highs 106 to 111. South wind 10 to 20 mph in the morning becoming southwest 5 to 10 mph in the afternoon. Gusts up to 30 mph in the morning. .WEDNESDAY NIGHT...Partly cloudy. Lows 77 to 87. South wind 10 to 15 mph. .THURSDAY...Mostly sunny and hot. Highs 107 to 112. South wind 5 to 15 mph. .THURSDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 83 to 88. .FRIDAY...Mostly sunny and hot. Highs 109 to 113. .FRIDAY NIGHT...Clear in the evening then becoming partly cloudy. Lows 84 to 89. .SATURDAY...Partly sunny and hot. Highs 109 to 113. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a slight chance of showers after midnight. Lows 82 to 87. Chance of rain 20 percent. .SUNDAY...Partly sunny. A slight chance of showers in the morning, then a slight chance of afternoon showers and thunderstorms. Hot. Highs 106 to 110. Chance of rain 10 percent. .SUNDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms after midnight. Lows 81 to 86. .MONDAY...Partly sunny with a 20 percent chance of showers and thunderstorms. Highs 104 to 108. $$ AZZ530-CAZ569-182300- Parker Valley-Palo Verde Valley- Including the cities of Parker, Ehrenberg, Martinez Lake, Blythe, Palo Verde, and Ripley 1146 AM MST Tue Aug 18 2026 /1146 AM PDT Tue Aug 18 2026/ ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST /8 PM PDT/ FRIDAY... .TODAY...Sunny and hot. Highs 109 to 114. Southwest wind 5 to 10 mph. .TONIGHT...Partly cloudy. Lows 77 to 87. South wind 5 to 15 mph. .WEDNESDAY...Mostly sunny and hot. Highs 107 to 112. South wind 5 to 15 mph. .WEDNESDAY NIGHT...Mostly clear in the evening then becoming partly cloudy. Lows 77 to 87. South wind 10 to 15 mph. .THURSDAY...Mostly sunny and hot. Highs 107 to 112. South wind 10 to 15 mph. .THURSDAY NIGHT...Partly cloudy. Lows 82 to 88. .FRIDAY...Partly sunny and hot. Highs 107 to 113. .FRIDAY NIGHT...Clear with a 10 percent chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows 82 to 88. .SATURDAY...Partly sunny and hot. Highs 108 to 114. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows 81 to 87. Chance of rain 20 percent. .SUNDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 106 to 112. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 81 to 87. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Hot. Highs 104 to 110. $$ CAZ565-570-182300- Imperial County Southeast-Chuckwalla Valley- Including the cities of Winterhaven and Midland 1146 AM PDT Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT FRIDAY... .TODAY...Mostly sunny and hot. Highs 109 to 114. Southwest wind 5 to 15 mph. .TONIGHT...Partly cloudy. Lows 79 to 89. South wind 5 to 15 mph. .WEDNESDAY...Partly sunny in the morning then becoming sunny. Hot. Highs 107 to 112. South wind 10 to 15 mph. .WEDNESDAY NIGHT...Mostly clear in the evening then becoming partly cloudy. Lows 79 to 89. South wind 10 to 15 mph. .THURSDAY...Mostly sunny and hot. Highs 107 to 112. South wind 10 to 15 mph. .THURSDAY NIGHT...Partly cloudy. Lows 81 to 89. .FRIDAY...Mostly sunny and hot. Highs 105 to 112. .FRIDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows 82 to 90. Chance of rain 20 percent. .SATURDAY...Partly sunny and hot. Highs 105 to 113. .SATURDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows 82 to 89. Chance of rain 10 percent. .SUNDAY...Partly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 103 to 111. .SUNDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows 82 to 89. .MONDAY...Partly sunny. A slight chance of showers in the morning, then a slight chance of afternoon showers and thunderstorms. Highs 101 to 109. Chance of rain 20 percent. $$ CAZ564-568-182300- Chuckwalla Mountains-Chiriaco Summit- Including the cities of Imperial Hot Mineral Springs and Chiriaco Summit 1146 AM PDT Tue Aug 18 2026 .TODAY...Mostly sunny and hot. Highs 106 to 111. South wind 5 to 15 mph. .TONIGHT...Partly cloudy. Lows 76 to 86. South wind 10 to 15 mph. .WEDNESDAY...Partly sunny in the morning then becoming sunny. Highs 104 to 109. South wind 5 to 15 mph. .WEDNESDAY NIGHT...Mostly clear. Lows 77 to 87. South wind 5 to 15 mph. .THURSDAY...Mostly sunny. Highs 104 to 109. South wind 5 to 15 mph. .THURSDAY NIGHT...Partly cloudy. Lows 78 to 87. .FRIDAY...Mostly sunny. Highs 99 to 109. .FRIDAY NIGHT...Mostly clear. Lows 79 to 88. .SATURDAY...Partly sunny and hot. Highs 99 to 111. .SATURDAY NIGHT...Partly cloudy. Lows 78 to 87. Chance of precipitation 10 percent. .SUNDAY...Partly sunny. Highs 98 to 108. .SUNDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms after midnight. Lows 77 to 86. .MONDAY...Partly sunny. A slight chance of showers in the morning, then a slight chance of afternoon showers and thunderstorms. Highs 96 to 106. Chance of rain 20 percent. $$ CAZ563-182300- Salton Sea- Including the city of Desert Shores 1146 AM PDT Tue Aug 18 2026 .TODAY...Mostly sunny in the morning then becoming partly sunny. Hot. Highs 107 to 112. Northwest wind 10 to 15 mph in the morning becoming east 5 to 10 mph in the afternoon. .TONIGHT...Partly cloudy in the evening then becoming mostly clear. Lows 80 to 90. Southwest wind 10 to 15 mph in the evening becoming southeast 5 to 10 mph after midnight. .WEDNESDAY...Partly sunny in the morning then becoming sunny. Hot. Highs 105 to 110. Southeast wind 10 to 15 mph in the morning becoming northwest 5 to 10 mph in the afternoon. .WEDNESDAY NIGHT...Mostly clear. Lows 80 to 90. East wind 10 to 15 mph. .THURSDAY...Mostly sunny and hot. Highs 105 to 110. Southeast wind 5 to 10 mph. .THURSDAY NIGHT...Partly cloudy. Lows 86 to 91. .FRIDAY...Mostly sunny. Highs 101 to 109. .FRIDAY NIGHT...Mostly clear. Lows 85 to 91. .SATURDAY...Partly sunny and hot. Highs 102 to 110. .SATURDAY NIGHT...Partly cloudy. Lows 86 to 91. .SUNDAY...Partly sunny. Highs 101 to 109. .SUNDAY NIGHT...Partly cloudy. Lows in the mid to upper 80s. .MONDAY...Mostly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 99 to 107. $$ CAZ567-182300- Imperial Valley- Including the cities of El Centro, Calexico, Alamorio, and Brawley 1146 AM PDT Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT FRIDAY... .TODAY...Mostly sunny and hot. Highs 109 to 114. South wind 5 to 10 mph. .TONIGHT...Partly cloudy. Lows 76 to 86. Southeast wind 5 to 10 mph. .WEDNESDAY...Partly sunny in the morning then becoming sunny. Hot. Highs 108 to 113. Southeast wind 5 to 15 mph. .WEDNESDAY NIGHT...Mostly clear. Lows 77 to 87. Southeast wind 5 to 15 mph. .THURSDAY...Mostly sunny and hot. Highs 108 to 113. Southeast wind 5 to 10 mph. .THURSDAY NIGHT...Partly cloudy. Lows in the mid to upper 80s. .FRIDAY...Mostly sunny and hot. Highs 109 to 113. .FRIDAY NIGHT...Mostly clear. Lows in the mid to upper 80s. .SATURDAY...Partly sunny and hot. Highs 110 to 114. .SATURDAY NIGHT...Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows in the mid to upper 80s. .SUNDAY...Partly sunny and hot. Highs 108 to 112. .SUNDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows in the lower to mid 80s. .MONDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Hot. Highs 106 to 110. $$ CAZ566-182300- Imperial County West- Including the cities of Coolidge Springs, Salton City, Winona, Coyote Wells, Ocotillo, and Plaster City 1146 AM PDT Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT FRIDAY... .TODAY...Mostly sunny in the morning then becoming partly sunny. Very hot. Highs 110 to 115. South wind 5 to 10 mph in the morning becoming southeast in the afternoon. .TONIGHT...Partly cloudy in the evening then becoming mostly clear. Lows 79 to 89. Southwest wind 5 to 15 mph. .WEDNESDAY...Mostly sunny and hot. Highs 109 to 114. East wind 5 to 15 mph. .WEDNESDAY NIGHT...Mostly clear. Lows 80 to 90. Southeast wind 5 to 15 mph in the evening becoming west 10 to 15 mph after midnight. .THURSDAY...Mostly sunny and hot. Highs 108 to 113. Northeast wind 5 to 10 mph in the morning becoming southeast 10 to 15 mph in the afternoon. .THURSDAY NIGHT...Mostly clear. Lows 84 to 90. .FRIDAY...Mostly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 108 to 112. .FRIDAY NIGHT...Partly cloudy. Lows 85 to 90. .SATURDAY...Mostly sunny and hot. Highs 110 to 114. .SATURDAY NIGHT...Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows 84 to 89. .SUNDAY...Mostly sunny, otherwise partly cloudy with a slight chance of showers in the morning, then a slight chance of afternoon showers and thunderstorms. Hot. Highs 108 to 112. Chance of rain 10 percent. .SUNDAY NIGHT...Partly cloudy. A 10 percent chance of showers in the evening. Lows 84 to 89. .MONDAY...Partly sunny. A slight chance of showers in the morning, then a slight chance of afternoon showers and thunderstorms. Hot. Highs 106 to 110. Chance of rain 20 percent. $$ CAZ562-182300- Imperial County Southwest- Including the city of Mountain Spring 1146 AM PDT Tue Aug 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT FRIDAY... .TODAY...Mostly sunny in the morning then becoming partly sunny. Hot. Highs 109 to 114. Southeast wind 10 to 15 mph. .TONIGHT...Partly cloudy in the evening then becoming mostly clear. Breezy. Lows 82 to 92. Southwest wind 10 to 20 mph. Gusts up to 30 mph in the evening. .WEDNESDAY...Sunny and hot. Highs 108 to 113. Northeast wind 5 to 10 mph in the morning becoming east 5 to 15 mph in the afternoon. .WEDNESDAY NIGHT...Mostly clear. Lows 82 to 92. South wind 5 to 15 mph in the evening becoming west 10 to 15 mph after midnight. .THURSDAY...Mostly sunny and hot. Highs 107 to 112. North wind 10 to 15 mph in the morning becoming east 10 to 20 mph in the afternoon. .THURSDAY NIGHT...Mostly clear. Lows 82 to 92. .FRIDAY...Partly sunny. A 20 percent chance of afternoon showers and thunderstorms. Hot. Highs 101 to 111. .FRIDAY NIGHT...Partly cloudy. A 10 percent chance of showers and thunderstorms in the evening. Lows 81 to 91. .SATURDAY...Mostly sunny. A 10 percent chance of afternoon showers and thunderstorms. Hot. Highs 102 to 112. .SATURDAY NIGHT...Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows 80 to 91. .SUNDAY...Partly sunny. A slight chance of showers in the morning, then a slight chance of afternoon showers and thunderstorms. Hot. Highs 101 to 111. Chance of rain 20 percent. .SUNDAY NIGHT...Partly cloudy. A 20 percent chance of showers in the evening. Lows 80 to 91. .MONDAY...Partly sunny. A slight chance of showers in the morning, then a slight chance of afternoon showers and thunderstorms. Highs 99 to 109. Chance of rain 20 percent. $$ CAZ560-561-182300- Joshua Tree NP West-Joshua Tree NP East- Including the cities of Cottonwood Visitor and Lost Horse-Keys Village 1146 AM PDT Tue Aug 18 2026 .TODAY...Mostly sunny in the morning then becoming partly sunny. Highs 99 to 109. Southwest wind 5 to 15 mph. .TONIGHT...Partly cloudy. Lows 75 to 85. Southwest wind 5 to 15 mph. .WEDNESDAY...Mostly sunny. Highs 98 to 108. South wind 5 to 15 mph. .WEDNESDAY NIGHT...Mostly clear. Lows 75 to 85. Southwest wind 5 to 15 mph. .THURSDAY...Mostly sunny. Highs 97 to 107. South wind 5 to 15 mph. .THURSDAY NIGHT...Partly cloudy. Lows 70 to 87. .FRIDAY...Mostly sunny. A 10 percent chance of afternoon showers and thunderstorms. Highs 91 to 107. .FRIDAY NIGHT...Mostly clear. Lows 70 to 86. .SATURDAY...Partly sunny. Highs 91 to 107. .SATURDAY NIGHT...Partly cloudy. A 10 percent chance of showers in the evening. Lows 69 to 85. .SUNDAY...Partly sunny. Highs 90 to 106. .SUNDAY NIGHT...Partly cloudy with a 10 percent chance of showers and thunderstorms. Lows 69 to 84. .MONDAY...Partly sunny. A slight chance of showers in the morning, then a slight chance of afternoon showers and thunderstorms. Highs 88 to 104. Chance of rain 20 percent. $$ Visit us on Facebook, Twitter, and at weather.gov/phoenix