Zone Forecast Product
Issued by NWS Boise, ID
Issued by NWS Boise, ID
270
FPUS55 KBOI 202031
ZFPBOI
Zone Forecasts for Southwest Idaho/Southeast Oregon
National Weather Service Boise ID
230 PM MDT Mon Jul 20 2026
Spot temperatures are for tonight, Tuesday, Tuesday night, and
Wednesday.
IDZ011-210400-
West Central Mountains-
230 PM MDT Mon Jul 20 2026
.TONIGHT...Partly cloudy. Areas of smoke. Lows 55 to 66.
.TUESDAY...Partly cloudy. Scattered showers in the morning, then
a chance of showers with a slight chance of thunderstorms in the
afternoon. Patchy smoke. Chance of rain 30 percent. Highs 80 to
94.
.TUESDAY NIGHT...Decreasing clouds. Areas of smoke. Lows 58 to
69.
.WEDNESDAY...Showers with a chance of thunderstorms in the
afternoon. Chance of rain 80 percent. Highs 79 to 92.
.WEDNESDAY NIGHT...Mostly cloudy with a chance of showers in the
evening, then partly cloudy after midnight. Chance of rain
40 percent. Lows 55 to 66.
.THURSDAY...Sunny. Highs 80 to 94.
.THURSDAY NIGHT...Partly cloudy with a slight chance of showers
and thunderstorms in the evening, then mostly clear after
midnight. Chance of rain 20 percent. Lows 56 to 66.
.FRIDAY...Sunny. Highs 80 to 94.
.FRIDAY NIGHT AND SATURDAY...Clear. Lows 55 to 65. Highs 78 to
92.
.SATURDAY NIGHT...Mostly clear. Lows 52 to 62.
.SUNDAY...Sunny. Highs 78 to 92.
.SUNDAY NIGHT AND MONDAY...Mostly clear. Lows 52 to 62. Highs
79 to 93.
&&
TEMPERATURE
McCall 55 89 58 87
$$
=
IDZ013-210400-
Boise Mountains-
230 PM MDT Mon Jul 20 2026
.TONIGHT...Increasing clouds. Areas of smoke. Lows 55 to 70.
.TUESDAY...Mostly cloudy in the morning, then becoming mostly
sunny. Scattered showers. Areas of smoke in the morning. Patchy
smoke in the afternoon. Chance of rain 30 percent. Highs 81 to
96.
.TUESDAY NIGHT...Partly cloudy. Patchy smoke. A slight chance of
showers after midnight. Chance of rain 20 percent. Lows 55 to 70.
.WEDNESDAY...Partly cloudy with a slight chance of showers in the
morning, then showers with a chance of thunderstorms in the
afternoon. Chance of rain 80 percent. Highs 77 to 92.
.WEDNESDAY NIGHT...Mostly cloudy with a slight chance of showers
in the evening, then mostly clear after midnight. Chance of rain
20 percent. Lows 51 to 66.
.THURSDAY...Sunny. Highs 81 to 96.
.THURSDAY NIGHT...Partly cloudy with a slight chance of showers
and thunderstorms in the evening, then mostly clear after
midnight. Chance of rain 20 percent. Lows 50 to 65.
.FRIDAY...Sunny. Highs 82 to 97.
.FRIDAY NIGHT THROUGH MONDAY...Mostly clear. Lows 48 to 63. Highs
82 to 97.
&&
TEMPERATURE
Idaho City 60 95 59 91
$$
=
IDZ028-210400-
Camas Prairie-
230 PM MDT Mon Jul 20 2026
.TONIGHT...Increasing clouds. Patchy smoke this evening, then
areas of smoke after midnight. Lows 60 to 65. West winds 10 to
15 mph.
.TUESDAY...Mostly cloudy in the morning, then clearing. Areas of
smoke in the morning, then patchy smoke in the afternoon. Highs
90 to 95. North winds up to 10 mph in the morning, shifting to
southwest in the afternoon.
.TUESDAY NIGHT...Partly cloudy in the evening, then mostly cloudy
with a slight chance of showers after midnight. Patchy smoke.
Chance of rain 20 percent. Lows 57 to 62. West winds 10 to 15 mph
in the evening, becoming light after midnight.
.WEDNESDAY...A slight chance of showers in the morning, then
showers likely with a chance of thunderstorms in the afternoon.
Chance of rain 60 percent. Highs 83 to 88. Southwest winds up to
10 mph with gusts to 20 mph.
.WEDNESDAY NIGHT...Mostly cloudy with a slight chance of showers
and thunderstorms in the evening, then partly cloudy after
midnight. Chance of rain 20 percent. Lows 52 to 58. Northwest
winds 10 to 15 mph in the evening, becoming light after midnight.
.THURSDAY AND THURSDAY NIGHT...Mostly clear. Highs 86 to 91. Lows
55 to 60.
.FRIDAY...Sunny. Highs 89 to 94.
.FRIDAY NIGHT AND SATURDAY...Mostly clear. Lows 55 to 60. Highs
88 to 93.
.SATURDAY NIGHT...Partly cloudy. Lows 53 to 58. Breezy.
.SUNDAY THROUGH MONDAY...Mostly clear. Highs 88 to 93. Lows 53 to
58.
&&
TEMPERATURE
Fairfield 60 93 57 85
$$
=
IDZ033-210400-
Upper Weiser River-
230 PM MDT Mon Jul 20 2026
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ THIS
EVENING...
.TONIGHT...Partly cloudy. Smoke this evening, then areas of smoke
after midnight. Lows 66 to 71. North winds 10 to 15 mph with
gusts to 30 mph.
.TUESDAY...Partly sunny. Areas of smoke in the morning, then
patchy smoke in the afternoon. Highs 93 to 100. North winds 10 to
15 mph in the morning, becoming light in the afternoon.
.TUESDAY NIGHT...Partly cloudy. Areas of smoke. Lows 68 to 73.
Northwest winds up to 10 mph with gusts to 20 mph.
.WEDNESDAY...Partly cloudy. A slight chance of showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
92 to 98. North winds 10 to 15 mph.
.WEDNESDAY NIGHT...Mostly cloudy in the evening, then clearing.
Lows 65 to 70. East winds up to 10 mph.
.THURSDAY...Sunny. Highs 94 to 100.
.THURSDAY NIGHT...Partly cloudy with a slight chance of showers
and thunderstorms in the evening, then mostly clear after
midnight. Chance of rain 20 percent. Lows 64 to 69.
.FRIDAY THROUGH SUNDAY...Clear. Highs 91 to 100. Lows 61 to 68.
Breezy.
.SUNDAY NIGHT AND MONDAY...Mostly clear. Lows 60 to 65. Highs
91 to 98.
&&
TEMPERATURE
Council 68 99 71 98
Cambridge 66 99 68 98
$$
=
ORZ064-210400-
Oregon Lower Treasure Valley-
230 PM MDT Mon Jul 20 2026 /130 PM PDT Mon Jul 20 2026/
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ THIS
EVENING...
.TONIGHT...Increasing clouds. Smoke. Lows 70 to 75. Breezy.
Northwest winds 10 to 20 mph with gusts to 30 mph.
.TUESDAY...Partly sunny. Areas of smoke. Highs 96 to 101. West
winds 10 to 15 mph.
.TUESDAY NIGHT...Partly cloudy. Areas of smoke. Lows 72 to 77.
Northwest winds 10 to 15 mph.
.WEDNESDAY...Partly sunny. Highs 96 to 101. Northwest winds 10 to
15 mph.
.WEDNESDAY NIGHT...Mostly cloudy in the evening, then clearing.
Lows 68 to 73. East winds up to 10 mph in the evening, shifting
to west after midnight.
.THURSDAY AND THURSDAY NIGHT...Mostly clear. Highs 98 to 103.
Lows 67 to 72.
.FRIDAY THROUGH SATURDAY...Clear. Highs 96 to 103. Lows 66 to 71.
.SATURDAY NIGHT...Mostly clear. Lows 64 to 69.
.SUNDAY...Sunny. Highs 95 to 100.
.SUNDAY NIGHT AND MONDAY...Mostly clear. Lows 63 to 68. Highs
95 to 100.
&&
TEMPERATURE
Ontario 72 99 72 99
$$
=
IDZ012-210400-
Lower Treasure Valley-
230 PM MDT Mon Jul 20 2026
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ THIS
EVENING...
.TONIGHT...Increasing clouds. Smoke. Lows 69 to 74. Northwest
winds 10 to 15 mph with gusts to 25 mph.
.TUESDAY...Mostly cloudy in the morning, then becoming mostly
sunny. Areas of smoke. Highs 95 to 100. Northwest winds 10 to
15 mph.
.TUESDAY NIGHT...Increasing clouds. Areas of smoke. Lows 69 to
74. Northwest winds 10 to 15 mph.
.WEDNESDAY...Partly sunny. Highs 94 to 99. West winds 10 to
15 mph.
.WEDNESDAY NIGHT...Partly cloudy. Lows 66 to 71. Northeast winds
10 to 15 mph in the evening, becoming light after midnight.
.THURSDAY AND THURSDAY NIGHT...Mostly clear. Highs 97 to 102.
Lows 65 to 70.
.FRIDAY THROUGH SATURDAY...Clear. Highs 95 to 102. Lows 64 to 69.
.SATURDAY NIGHT THROUGH MONDAY...Mostly clear. Lows 61 to 67.
Highs 94 to 99.
&&
TEMPERATURE
Caldwell 71 97 71 97
$$
=
IDZ014-210400-
Upper Treasure Valley-
230 PM MDT Mon Jul 20 2026
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ THIS
EVENING...
.TONIGHT...Increasing clouds. Smoke. Lows 69 to 74. West winds
10 to 15 mph with gusts to 25 mph.
.TUESDAY...Decreasing clouds. Areas of smoke in the morning, then
patchy smoke in the afternoon. Highs 95 to 100. Breezy. Northwest
winds 10 to 20 mph. Gusts to 30 mph in the afternoon.
.TUESDAY NIGHT...Partly cloudy in the evening, then mostly cloudy
with a slight chance of showers after midnight. Patchy smoke.
Chance of rain 20 percent. Lows 68 to 73. Breezy. Northwest winds
10 to 20 mph. Gusts to 30 mph in the evening, decreasing to
20 mph after midnight.
.WEDNESDAY...Partly cloudy with a slight chance of showers. A
slight chance of thunderstorms in the afternoon. Chance of rain
20 percent. Highs 93 to 98. Southeast winds up to 10 mph in the
morning, shifting to southwest in the afternoon.
.WEDNESDAY NIGHT...Mostly cloudy in the evening, then clearing.
Lows 65 to 70. Northwest winds 10 to 15 mph with gusts to 25 mph
in the evening, shifting to southwest after midnight.
.THURSDAY AND THURSDAY NIGHT...Mostly clear. Highs 97 to 102.
Lows 65 to 70.
.FRIDAY...Sunny. Highs 99 to 104.
.FRIDAY NIGHT THROUGH MONDAY...Mostly clear. Lows 61 to 70. Highs
95 to 101.
&&
TEMPERATURE
Boise 72 97 71 96
Mountain Home 71 99 71 96
$$
=
IDZ016-210400-
Western Magic Valley-
230 PM MDT Mon Jul 20 2026
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING...
.TONIGHT...Increasing clouds. Patchy smoke this evening, then
areas of smoke after midnight. Lows 68 to 73. West winds 10 to
15 mph with gusts to 25 mph.
.TUESDAY...Partly sunny in the morning, then clearing. Areas of
smoke in the morning, then patchy smoke in the afternoon. Highs
92 to 97. West winds 10 to 15 mph.
.TUESDAY NIGHT...Increasing clouds. Patchy smoke. A slight chance
of showers after midnight. Chance of rain 20 percent. Lows 67 to
72. Southwest winds 10 to 15 mph with gusts to 25 mph.
.WEDNESDAY...Mostly cloudy in the morning, then becoming partly
sunny. A slight chance of showers. A slight chance of
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
88 to 93. South winds around 10 mph in the morning, shifting to
northwest in the afternoon.
.WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and
thunderstorms in the evening. Chance of rain 20 percent. Lows
63 to 68. West winds 10 to 15 mph in the evening, shifting to
southeast after midnight.
.THURSDAY THROUGH SATURDAY...Mostly clear. Highs 92 to 99. Lows
64 to 70.
.SATURDAY NIGHT...Decreasing clouds. Lows 62 to 67.
.SUNDAY THROUGH MONDAY...Mostly clear. Highs 92 to 98. Lows 61 to
66.
&&
TEMPERATURE
Jerome 71 92 70 88
Twin Falls 72 93 71 89
$$
=
IDZ029-210400-
Owyhee Mountains-
230 PM MDT Mon Jul 20 2026
.TONIGHT...Increasing clouds. Smoke. Lows 64 to 72.
.TUESDAY...Mostly cloudy in the morning, then becoming mostly
sunny. Areas of smoke. Highs 87 to 92.
.TUESDAY NIGHT...Increasing clouds. Areas of smoke. Lows 64 to
72.
.WEDNESDAY...Mostly cloudy. A chance of showers and thunderstorms
in the afternoon. Chance of rain 30 percent. Highs 86 to 91.
.WEDNESDAY NIGHT...Mostly cloudy in the evening, then clearing.
Lows 60 to 69.
.THURSDAY AND THURSDAY NIGHT...Mostly clear. Highs 90 to 96. Lows
61 to 69.
.FRIDAY...Sunny. Highs 91 to 96.
.FRIDAY NIGHT THROUGH MONDAY...Mostly clear. Lows 58 to 68. Highs
88 to 94.
$$
=
IDZ015-210400-
Southwest Highlands-
230 PM MDT Mon Jul 20 2026
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING...
.TONIGHT...Mostly cloudy. Patchy smoke this evening. Areas of
smoke after midnight. Lows 64 to 70. Breezy.
.TUESDAY...Decreasing clouds. Areas of smoke. A slight chance of
showers in the afternoon. Chance of rain 20 percent. Highs 89 to
95. Breezy.
.TUESDAY NIGHT...Mostly cloudy with a 20 percent chance of
showers. Areas of smoke in the evening. Patchy smoke after
midnight. Lows 63 to 70. Breezy.
.WEDNESDAY...Decreasing clouds. A slight chance of showers. A
slight chance of thunderstorms in the afternoon. Chance of rain
20 percent. Highs 85 to 92.
.WEDNESDAY NIGHT...Mostly cloudy in the evening, then clearing.
Lows 60 to 66.
.THURSDAY...Sunny. Highs 90 to 97.
.THURSDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows 60 to 67.
.FRIDAY THROUGH MONDAY...Mostly clear. Highs 91 to 99. Lows 58 to
67. Breezy.
$$
=
IDZ030-210400-
Southern Twin Falls County-
230 PM MDT Mon Jul 20 2026
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING...
.TONIGHT...Mostly cloudy. Patchy smoke. Lows 65 to 71.
.TUESDAY...Mostly sunny. Patchy smoke. A chance of showers with a
slight chance of thunderstorms in the afternoon. Chance of rain
30 percent. Highs 90 to 95.
.TUESDAY NIGHT...A slight chance of thunderstorms in the evening.
Mostly cloudy with a chance of showers. Patchy smoke. Chance of
rain 30 percent. Lows 64 to 70.
.WEDNESDAY...Mostly cloudy with a chance of showers. A chance of
thunderstorms in the afternoon. Chance of rain 30 percent. Highs
86 to 91.
.WEDNESDAY NIGHT...Decreasing clouds. A slight chance of showers
and thunderstorms in the evening. Chance of rain 20 percent. Lows
62 to 67.
.THURSDAY...Sunny. Highs 90 to 95.
.THURSDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows 65 to 70.
.FRIDAY...Partly cloudy. A slight chance of showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
92 to 97.
.FRIDAY NIGHT...Decreasing clouds. Lows 64 to 69.
.SATURDAY...Partly cloudy. A slight chance of showers in the
afternoon. Chance of rain 20 percent. Highs 91 to 96.
.SATURDAY NIGHT...Partly cloudy in the evening, then clearing.
Lows 62 to 67.
.SUNDAY...Sunny. Highs 91 to 96.
.SUNDAY NIGHT...Increasing clouds. Lows 61 to 66.
.MONDAY...Sunny. Highs 92 to 97.
$$
=
ORZ062-210400-
Baker County-
130 PM PDT Mon Jul 20 2026
.TONIGHT...Partly cloudy. Smoke. Lows 56 to 67. Breezy. Northwest
winds 10 to 20 mph. Gusts to 35 mph this evening, decreasing to
25 mph after midnight.
.TUESDAY...Mostly sunny. Areas of smoke. Highs 90 to 99.
Northwest winds up to 10 mph with gusts to 20 mph.
.TUESDAY NIGHT...Mostly cloudy. Areas of smoke. Lows 59 to 69.
Northwest winds up to 10 mph with gusts to 20 mph.
.WEDNESDAY...Mostly sunny. Highs 90 to 99. Northwest winds up to
10 mph with gusts to 20 mph.
.WEDNESDAY NIGHT...Mostly cloudy in the evening, then clearing.
Lows 58 to 69. North winds up to 10 mph in the evening, shifting
to southwest after midnight. Gusts to 20 mph.
.THURSDAY AND THURSDAY NIGHT...Partly cloudy. A slight chance of
showers and thunderstorms. Chance of rain 20 percent. Highs 91 to
100. Lows 56 to 66.
.FRIDAY THROUGH SUNDAY...Clear. Highs 89 to 99. Lows 51 to 64.
.SUNDAY NIGHT AND MONDAY...Mostly clear. Lows 51 to 62. Highs
87 to 97.
&&
TEMPERATURE
Baker City 56 94 60 95
$$
=
ORZ061-210400-
Harney County-
130 PM PDT Mon Jul 20 2026
.TONIGHT...Increasing clouds. Areas of smoke this evening, then
smoke after midnight. Lows 56 to 64. Northwest winds 10 to
15 mph. Gusts to 30 mph this evening.
.TUESDAY...Partly sunny. Smoke in the morning, then areas of
smoke in the afternoon. Highs 83 to 93. West winds up to 10 mph
with gusts to 20 mph.
.TUESDAY NIGHT...Mostly cloudy. Areas of smoke. Lows 58 to 65.
Northwest winds up to 10 mph.
.WEDNESDAY...Partly cloudy. A chance of showers and thunderstorms
in the afternoon. Chance of rain 30 percent. Highs 83 to 93.
Northwest winds up to 10 mph with gusts to 20 mph.
.WEDNESDAY NIGHT...Partly cloudy. A chance of showers and
thunderstorms in the evening. Chance of rain 30 percent. Lows
57 to 64. North winds around 10 mph in the evening, shifting to
west up to 10 mph after midnight. Gusts to 20 mph.
.THURSDAY...Sunny. Highs 87 to 97.
.THURSDAY NIGHT...Mostly clear. Patchy fog after midnight. Lows
53 to 61.
.FRIDAY...Areas of fog in the morning. Sunny. Highs 85 to 95.
.FRIDAY NIGHT...Clear. Lows 52 to 60.
.SATURDAY THROUGH MONDAY...Mostly clear. Highs 83 to 93. Lows
50 to 59.
&&
TEMPERATURE
Burns 57 93 60 93
$$
=
ORZ063-210400-
Malheur County-
230 PM MDT Mon Jul 20 2026 /130 PM PDT Mon Jul 20 2026/
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ THIS
EVENING...
.TONIGHT...Mostly cloudy. Smoke. Lows 63 to 72. Breezy. Northwest
winds 10 to 20 mph with gusts to 30 mph.
.TUESDAY...Decreasing clouds. Areas of smoke. Highs 91 to 97.
West winds 10 to 15 mph.
.TUESDAY NIGHT...Mostly cloudy. Areas of smoke. Lows 63 to 73.
Northwest winds 10 to 15 mph.
.WEDNESDAY...Mostly cloudy in the morning, then partly cloudy
with a slight chance of showers and thunderstorms in the
afternoon. Chance of rain 20 percent. Highs 89 to 97. West winds
10 to 15 mph.
.WEDNESDAY NIGHT...Mostly cloudy with a slight chance of showers
and thunderstorms in the evening, then partly cloudy after
midnight. Chance of rain 20 percent. Lows 60 to 70. Northeast
winds around 10 mph with gusts to 20 mph in the evening, shifting
to south up to 10 mph after midnight.
.THURSDAY AND THURSDAY NIGHT...Mostly clear. Highs 94 to 100.
Lows 60 to 69.
.FRIDAY...Sunny. Highs 94 to 100.
.FRIDAY NIGHT THROUGH MONDAY...Mostly clear. Lows 57 to 67. Highs
91 to 98.
$$
=