Zone Forecast Product
Issued by NWS Boise, ID
Issued by NWS Boise, ID
325
FPUS55 KBOI 182031
ZFPBOI
Zone Forecasts for Southwest Idaho/Southeast Oregon
National Weather Service Boise ID
230 PM MDT Tue Aug 18 2026
Spot temperatures are for tonight, Wednesday, Wednesday night,
and Thursday.
IDZ011-190400-
West Central Mountains-
230 PM MDT Tue Aug 18 2026
.TONIGHT...Mostly clear. Patchy smoke. Lows 47 to 58.
.WEDNESDAY...Sunny. Highs 77 to 91.
.WEDNESDAY NIGHT...Mostly clear. Lows 50 to 60.
.THURSDAY...Sunny. Highs 83 to 96.
.THURSDAY NIGHT...Increasing clouds. Lows 54 to 65.
.FRIDAY...Partly sunny. Highs 83 to 97.
.FRIDAY NIGHT...Mostly cloudy. A slight chance of showers in the
evening. Chance of rain 20 percent. Lows 54 to 65.
.SATURDAY...Mostly cloudy in the morning, then partly cloudy with
a chance of showers with a slight chance of thunderstorms in the
afternoon. Chance of rain 30 percent. Highs 75 to 88.
.SATURDAY NIGHT...Partly cloudy. A slight chance of showers and
thunderstorms in the evening. Areas of fog after midnight. Chance
of rain 20 percent. Lows 48 to 58.
.SUNDAY...Areas of fog in the morning. Sunny. Highs 72 to 85.
.SUNDAY NIGHT AND MONDAY...Mostly clear. Lows 48 to 58. Highs
76 to 89.
.MONDAY NIGHT...Partly cloudy. Lows 51 to 61.
.TUESDAY...Partly cloudy. A chance of showers with a slight
chance of thunderstorms in the afternoon. Chance of rain
30 percent. Highs 75 to 89.
&&
TEMPERATURE
McCall 47 85 49 91
$$
=
IDZ013-190400-
Boise Mountains-
230 PM MDT Tue Aug 18 2026
.TONIGHT...Mostly clear. Lows 46 to 61.
.WEDNESDAY...Sunny. Highs 80 to 95.
.WEDNESDAY NIGHT...Mostly clear. Lows 47 to 62.
.THURSDAY...Sunny. Highs 85 to 100.
.THURSDAY NIGHT...Partly cloudy. Lows 51 to 66.
.FRIDAY...Mostly sunny. Highs 85 to 100.
.FRIDAY NIGHT...Mostly cloudy. Lows 50 to 65.
.SATURDAY...Mostly cloudy in the morning, then partly cloudy with
a chance of showers with a slight chance of thunderstorms in the
afternoon. Chance of rain 30 percent. Highs 77 to 92.
.SATURDAY NIGHT...Partly cloudy. Lows 44 to 59.
.SUNDAY AND SUNDAY NIGHT...Mostly clear. Highs 75 to 89. Lows
44 to 59.
.MONDAY...Partly cloudy. A slight chance of rain showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
78 to 93.
.MONDAY NIGHT...Partly cloudy. Lows 46 to 61.
.TUESDAY...Partly cloudy. A slight chance of rain showers in the
morning, then a chance of rain showers with a slight chance of
thunderstorms in the afternoon. Chance of rain 30 percent. Highs
77 to 92.
&&
TEMPERATURE
Idaho City 48 94 50 99
$$
=
IDZ028-190400-
Camas Prairie-
230 PM MDT Tue Aug 18 2026
.TONIGHT...Mostly clear. Lows 47 to 54. Northwest winds 10 to
15 mph. Gusts to 25 mph this evening.
.WEDNESDAY...Sunny. Highs 87 to 92. West winds up to 10 mph.
Gusts to 20 mph in the afternoon.
.WEDNESDAY NIGHT...Mostly clear. Lows 51 to 57. North winds
around 10 mph. Gusts to 20 mph in the evening.
.THURSDAY...Sunny. Highs 92 to 97. Northeast winds around 10 mph
in the morning, shifting to south in the afternoon. Gusts to
20 mph.
.THURSDAY NIGHT...Partly cloudy. Lows 56 to 61. Northwest winds
around 10 mph with gusts to 20 mph.
.FRIDAY...Mostly sunny. Highs 92 to 97.
.FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of
showers. Lows 56 to 61.
.SATURDAY...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 84 to 89.
.SATURDAY NIGHT THROUGH MONDAY...Partly cloudy. Lows 48 to 54.
Highs 82 to 88.
.MONDAY NIGHT...Mostly cloudy. A slight chance of showers in the
evening. Chance of rain 20 percent. Lows 51 to 56.
.TUESDAY...Partly cloudy with a slight chance of showers. A
slight chance of thunderstorms in the afternoon. Chance of rain
20 percent. Highs 82 to 87.
&&
TEMPERATURE
Fairfield 48 89 51 94
$$
=
IDZ033-190400-
Upper Weiser River-
230 PM MDT Tue Aug 18 2026
.TONIGHT...Mostly clear. Patchy smoke after midnight. Lows 58 to
64. North winds up to 10 mph.
.WEDNESDAY...Patchy smoke in the morning. Sunny. Highs 90 to 95.
Northeast winds up to 10 mph in the morning, becoming light in
the afternoon.
.WEDNESDAY NIGHT...Mostly clear. Lows 61 to 66. Northeast winds
up to 10 mph.
.THURSDAY...Sunny. Highs 94 to 100. Northeast winds up to 10 mph
in the morning, shifting to southwest in the afternoon.
.THURSDAY NIGHT...Increasing clouds. Lows 65 to 70. Light winds.
.FRIDAY AND FRIDAY NIGHT...Mostly cloudy. Highs 93 to 100. Lows
65 to 70.
.SATURDAY...Mostly cloudy in the morning, then clearing. Highs
87 to 93.
.SATURDAY NIGHT THROUGH MONDAY...Mostly clear. Lows 58 to 63.
Highs 84 to 93.
.MONDAY NIGHT...Partly cloudy. Lows 61 to 66.
.TUESDAY...Partly cloudy. A slight chance of showers in the
morning. Chance of rain 20 percent. Highs 87 to 93.
&&
TEMPERATURE
Council 61 94 63 99
Cambridge 58 95 61 99
$$
=
ORZ064-190400-
Oregon Lower Treasure Valley-
230 PM MDT Tue Aug 18 2026 /130 PM PDT Tue Aug 18 2026/
.TONIGHT...Mostly clear. Lows 61 to 67. Northwest winds around
10 mph with gusts to 20 mph.
.WEDNESDAY...Sunny. Highs 93 to 98. Northwest winds up to 10 mph
in the morning, becoming light in the afternoon.
.WEDNESDAY NIGHT...Mostly clear. Patchy smoke after midnight.
Lows 62 to 68. North winds up to 10 mph.
.THURSDAY...Patchy smoke in the morning. Sunny. Highs 96 to 101.
Light winds.
.THURSDAY NIGHT...Increasing clouds. Lows 65 to 71. Light winds.
.FRIDAY AND FRIDAY NIGHT...Mostly cloudy. Highs 96 to 101. Lows
66 to 72.
.SATURDAY...Mostly sunny. Highs 92 to 97.
.SATURDAY NIGHT THROUGH MONDAY...Mostly clear. Lows 60 to 65.
Highs 88 to 96.
.MONDAY NIGHT AND TUESDAY...Partly cloudy. Lows 62 to 68. Highs
91 to 96.
&&
TEMPERATURE
Ontario 61 96 62 99
$$
=
IDZ012-190400-
Lower Treasure Valley-
230 PM MDT Tue Aug 18 2026
.TONIGHT...Mostly clear. Patchy smoke after midnight. Lows 59 to
65. Northwest winds up to 10 mph with gusts to 20 mph.
.WEDNESDAY...Patchy smoke in the morning. Sunny. Highs 92 to 97.
Light winds.
.WEDNESDAY NIGHT...Mostly clear. Lows 60 to 66. Light winds.
.THURSDAY...Sunny. Highs 96 to 101. Light winds.
.THURSDAY NIGHT...Increasing clouds. Lows 63 to 68. North winds
up to 10 mph.
.FRIDAY...Mostly sunny. Highs 95 to 100.
.FRIDAY NIGHT AND SATURDAY...Mostly cloudy. Lows 64 to 69. Highs
91 to 96.
.SATURDAY NIGHT THROUGH SUNDAY NIGHT...Mostly clear. Lows 58 to
63. Highs 87 to 92.
.MONDAY THROUGH TUESDAY...Partly cloudy. Highs 90 to 95. Lows
60 to 65.
&&
TEMPERATURE
Caldwell 60 95 61 99
$$
=
IDZ014-190400-
Upper Treasure Valley-
230 PM MDT Tue Aug 18 2026
.TONIGHT...Mostly clear. Lows 58 to 63. Northwest winds 10 to
15 mph. Gusts to 25 mph this evening.
.WEDNESDAY...Mostly sunny. Highs 93 to 98. Northwest winds up to
10 mph.
.WEDNESDAY NIGHT...Mostly clear. Lows 60 to 65. Light winds.
.THURSDAY...Sunny. Highs 98 to 103. Light winds in the morning,
becoming west around 10 mph in the afternoon.
.THURSDAY NIGHT...Partly cloudy. Lows 63 to 68. North winds
around 10 mph with gusts to 20 mph in the evening, becoming light
after midnight.
.FRIDAY...Mostly sunny. Highs 97 to 102.
.FRIDAY NIGHT...Mostly cloudy. Lows 64 to 69.
.SATURDAY THROUGH TUESDAY...Partly cloudy. Highs 87 to 97. Lows
57 to 65.
&&
TEMPERATURE
Boise 63 95 65 99
Mountain Home 59 97 62 102
$$
=
IDZ016-190400-
Western Magic Valley-
230 PM MDT Tue Aug 18 2026
.TONIGHT...Mostly clear. Lows 58 to 63. Northwest winds 10 to
15 mph with gusts to 25 mph this evening, becoming light after
midnight.
.WEDNESDAY...Sunny. Highs 90 to 95. Light winds.
.WEDNESDAY NIGHT...Mostly clear. Lows 61 to 66. Light winds in
the evening, becoming east around 10 mph after midnight.
.THURSDAY...Sunny. Highs 95 to 100. Northeast winds around
10 mph.
.THURSDAY NIGHT...Partly cloudy. A slight chance of showers and
thunderstorms in the evening. Chance of rain 20 percent. Lows
64 to 69. West winds around 10 mph in the evening, shifting to
southeast after midnight.
.FRIDAY...Mostly sunny. Highs 95 to 100.
.FRIDAY NIGHT...Mostly cloudy with a 20 percent chance of
showers. Lows 64 to 69.
.SATURDAY...Mostly cloudy in the morning, then partly cloudy with
a slight chance of showers and thunderstorms in the afternoon.
Chance of rain 20 percent. Highs 88 to 93.
.SATURDAY NIGHT THROUGH SUNDAY NIGHT...Partly cloudy. Lows 58 to
64. Highs 84 to 89.
.MONDAY...Partly cloudy. A slight chance of showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
87 to 92.
.MONDAY NIGHT...Mostly cloudy. A slight chance of showers and
thunderstorms in the evening. Chance of rain 20 percent. Lows
60 to 65.
.TUESDAY...Partly cloudy with a slight chance of showers. A
slight chance of thunderstorms in the afternoon. Chance of rain
20 percent. Highs 87 to 92.
&&
TEMPERATURE
Jerome 60 90 63 96
Twin Falls 62 91 65 96
$$
=
IDZ029-190400-
Owyhee Mountains-
230 PM MDT Tue Aug 18 2026
.TONIGHT...Mostly clear. Lows 56 to 65.
.WEDNESDAY...Mostly sunny. Highs 85 to 94.
.WEDNESDAY NIGHT...Mostly clear. Lows 59 to 67.
.THURSDAY...Sunny. Highs 89 to 97.
.THURSDAY NIGHT...Increasing clouds. Lows 61 to 70.
.FRIDAY...Mostly sunny. Highs 88 to 95.
.FRIDAY NIGHT...Mostly cloudy. Lows 60 to 69.
.SATURDAY...Mostly cloudy in the morning, then clearing. Highs
84 to 90.
.SATURDAY NIGHT...Increasing clouds. Lows 54 to 62.
.SUNDAY AND SUNDAY NIGHT...Partly cloudy. Highs 80 to 87. Lows
54 to 63.
.MONDAY...Partly cloudy. A slight chance of showers in the
afternoon. Chance of rain 20 percent. Highs 83 to 90.
.MONDAY NIGHT...Increasing clouds. Lows 57 to 65.
.TUESDAY...Partly cloudy. A slight chance of showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
83 to 89.
$$
=
IDZ015-190400-
Southwest Highlands-
230 PM MDT Tue Aug 18 2026
.TONIGHT...Mostly clear. Lows 57 to 62.
.WEDNESDAY...Mostly sunny. Highs 89 to 95.
.WEDNESDAY NIGHT...Mostly clear. Lows 59 to 65.
.THURSDAY...Mostly sunny. Highs 94 to 99.
.THURSDAY NIGHT...Partly cloudy. Lows 61 to 66.
.FRIDAY...Mostly sunny. Highs 93 to 98.
.FRIDAY NIGHT...Mostly cloudy. A slight chance of showers in the
evening. Chance of rain 20 percent. Lows 60 to 66.
.SATURDAY...Mostly cloudy in the morning, then partly cloudy with
a slight chance of thunderstorms in the afternoon. Highs 87 to
93.
.SATURDAY NIGHT...Partly cloudy. Lows 56 to 61. Breezy.
.SUNDAY...Partly cloudy. A slight chance of thunderstorms in the
afternoon. Highs 84 to 89.
.SUNDAY NIGHT...Partly cloudy. Lows 55 to 60.
.MONDAY...Partly cloudy. A slight chance of showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
86 to 91.
.MONDAY NIGHT...Mostly cloudy with a slight chance of showers in
the evening, then partly cloudy after midnight. Chance of rain
20 percent. Lows 57 to 62.
.TUESDAY...Partly cloudy. A slight chance of showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
85 to 91.
$$
=
IDZ030-190400-
Southern Twin Falls County-
230 PM MDT Tue Aug 18 2026
.TONIGHT...Decreasing clouds. Lows 59 to 64.
.WEDNESDAY...Mostly sunny. Highs 89 to 94.
.WEDNESDAY NIGHT...Increasing clouds. Lows 62 to 67.
.THURSDAY...Partly cloudy. A slight chance of showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
94 to 99.
.THURSDAY 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 65 to 70.
.FRIDAY...Mostly sunny. Highs 94 to 99.
.FRIDAY NIGHT...Mostly cloudy. A chance of showers, mainly in the
evening. Chance of rain 30 percent. Lows 65 to 70.
.SATURDAY...Partly cloudy. A chance of showers and thunderstorms
in the afternoon. Chance of rain 40 percent. Highs 87 to 92.
.SATURDAY 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 59 to 64.
.SUNDAY...Partly cloudy. A chance of showers and thunderstorms in
the afternoon. Chance of rain 30 percent. Highs 83 to 88.
.SUNDAY NIGHT...Mostly cloudy with a slight chance of showers in
the evening, then partly cloudy after midnight. Chance of rain
20 percent. Lows 58 to 63.
.MONDAY...Partly cloudy. A slight chance of showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
86 to 91.
.MONDAY NIGHT...Mostly cloudy. A chance of showers with a slight
chance of thunderstorms in the evening. Chance of rain
30 percent. Lows 61 to 66.
.TUESDAY...Partly cloudy. A slight chance of showers and
thunderstorms in the afternoon. Chance of rain 20 percent. Highs
86 to 91.
$$
=
ORZ062-190400-
Baker County-
130 PM PDT Tue Aug 18 2026
.TONIGHT...Mostly clear. Patchy smoke after midnight. Lows 47 to
60. Northwest winds 10 to 15 mph.
.WEDNESDAY...Sunny. Highs 87 to 95. Light winds.
.WEDNESDAY NIGHT...Mostly clear. Patchy smoke after midnight.
Lows 50 to 63. Light winds.
.THURSDAY...Patchy smoke in the morning. Sunny. Highs 92 to 100.
Light winds in the morning, becoming south up to 10 mph in the
afternoon.
.THURSDAY NIGHT...Increasing clouds. Lows 55 to 67. Northwest
winds up to 10 mph.
.FRIDAY AND FRIDAY NIGHT...Mostly cloudy. Highs 90 to 99. Lows
52 to 65.
.SATURDAY...Partly sunny in the morning, then clearing. Highs
83 to 93.
.SATURDAY NIGHT...Mostly clear. Lows 43 to 57.
.SUNDAY...Patchy fog in the morning. Sunny. Highs 81 to 90.
.SUNDAY NIGHT AND MONDAY...Mostly clear. Lows 45 to 59. Highs
85 to 93.
.MONDAY NIGHT AND TUESDAY...Partly cloudy. Lows 49 to 62. Highs
84 to 93.
&&
TEMPERATURE
Baker City 47 90 50 95
$$
=
ORZ061-190400-
Harney County-
130 PM PDT Tue Aug 18 2026
.TONIGHT...Mostly clear. Lows 50 to 59. Northwest winds up to
10 mph with gusts to 20 mph.
.WEDNESDAY...Mostly sunny. Highs 84 to 94. Light winds.
.WEDNESDAY NIGHT...Mostly clear. Lows 52 to 61. North winds up to
10 mph.
.THURSDAY...Sunny. Highs 86 to 96. Southwest winds up to 10 mph.
Gusts to 20 mph in the afternoon.
.THURSDAY NIGHT...Mostly cloudy. Lows 56 to 64. West winds up to
10 mph. Gusts to 20 mph in the evening.
.FRIDAY...Decreasing clouds. Highs 83 to 93.
.FRIDAY NIGHT...Mostly cloudy. A slight chance of showers in the
evening. Chance of rain 20 percent. Lows 51 to 60.
.SATURDAY...Partly sunny in the morning, then clearing. Highs
79 to 89.
.SATURDAY NIGHT THROUGH SUNDAY NIGHT...Mostly clear. Lows 44 to
56. Highs 78 to 88.
.MONDAY THROUGH TUESDAY...Partly cloudy. Highs 81 to 91. Lows
49 to 58.
&&
TEMPERATURE
Burns 50 93 52 95
$$
=
ORZ063-190400-
Malheur County-
230 PM MDT Tue Aug 18 2026 /130 PM PDT Tue Aug 18 2026/
.TONIGHT...Mostly clear. Lows 55 to 65. North winds 10 to 15 mph.
.WEDNESDAY...Mostly sunny. Highs 91 to 97. North winds up to
10 mph.
.WEDNESDAY NIGHT...Mostly clear. Lows 57 to 66. North winds up to
10 mph with gusts to 20 mph.
.THURSDAY...Sunny. Highs 95 to 100. Southwest winds up to 10 mph.
Gusts to 20 mph in the afternoon.
.THURSDAY NIGHT...Increasing clouds. Lows 60 to 69. West winds
10 to 15 mph in the evening, becoming light after midnight.
.FRIDAY AND FRIDAY NIGHT...Mostly cloudy. Highs 93 to 98. Lows
58 to 68.
.SATURDAY...Mostly cloudy in the morning, then clearing. Highs
88 to 94.
.SATURDAY NIGHT THROUGH SUNDAY NIGHT...Mostly clear. Lows 52 to
62. Highs 85 to 91. Breezy.
.MONDAY AND MONDAY NIGHT...Partly cloudy. Highs 88 to 93. Lows
55 to 65.
.TUESDAY...Partly sunny in the morning, then partly cloudy with a
slight chance of showers in the afternoon. Chance of rain
20 percent. Highs 87 to 93.
$$
=