859
FPUS55 KBOI 212110
ZFPBOI
ZONE FORECASTS FOR SOUTHWEST IDAHO/SOUTHEAST OREGON
NATIONAL WEATHER SERVICE BOISE ID
209 PM MST WED JAN 21 2026
SPOT TEMPERATURES ARE FOR TONIGHT, THURSDAY, THURSDAY NIGHT, AND
FRIDAY.
IDZ011-220500-
WEST CENTRAL MOUNTAINS-
209 PM MST WED JAN 21 2026
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST /5 AM
MST/ FRIDAY...
TONIGHT
INCREASING CLOUDS. LOWS 6 TO 17.
THURSDAY
MOSTLY SUNNY. HIGHS 28 TO 35.
THURSDAY NIGHT
MOSTLY CLOUDY. PATCHY FOG AFTER MIDNIGHT. LOWS
7 TO 18.
FRIDAY
AREAS OF FOG IN THE MORNING. SUNNY. HIGHS 26 TO 35.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS ZERO TO 15 ABOVE ZERO.
SATURDAY
PATCHY FOG IN THE MORNING. SUNNY. HIGHS 25 TO 34.
WIND CHILLS AS LOW AS 10 BELOW IN THE MORNING.
SATURDAY NIGHT
CLEAR. LOWS 3 TO 16. WIND CHILLS AS LOW AS
5 BELOW.
SUNDAY
PATCHY FOG IN THE MORNING. SUNNY. HIGHS 27 TO 35. WIND
CHILLS AS LOW AS 10 BELOW IN THE MORNING.
SUNDAY NIGHT
INCREASING CLOUDS. LOWS 9 TO 20. WIND CHILLS AS
LOW AS 5 BELOW.
MONDAY
PARTLY CLOUDY. A SLIGHT CHANCE OF SNOW IN THE
AFTERNOON. CHANCE OF SNOW 20 PERCENT. HIGHS 28 TO 37. WIND CHILLS
AS LOW AS 5 BELOW IN THE MORNING.
MONDAY NIGHT AND TUESDAY
PARTLY CLOUDY. LOWS 15 TO 24. HIGHS
32 TO 40.
TUESDAY NIGHT
PARTLY CLOUDY. PATCHY FOG AFTER MIDNIGHT. LOWS
18 TO 26.
WEDNESDAY
PATCHY FOG IN THE MORNING. PARTLY CLOUDY WITH A
20 PERCENT CHANCE OF SNOW. HIGHS 35 TO 42.
TEMPERATURE
MCCALL 4 32 5 32
=
IDZ013-220500-
BOISE MOUNTAINS-
209 PM MST WED JAN 21 2026
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST /5 AM
MST/ FRIDAY...
TONIGHT
MOSTLY CLEAR. PATCHY FOG AFTER MIDNIGHT. LOWS 9 TO 22.
THURSDAY
MOSTLY SUNNY. HIGHS 29 TO 39.
THURSDAY NIGHT
MOSTLY CLOUDY. PATCHY FOG AFTER MIDNIGHT. LOWS
10 TO 23.
FRIDAY
PARTLY SUNNY IN THE MORNING, THEN CLEARING. AREAS OF
FOG IN THE MORNING. HIGHS 27 TO 38.
FRIDAY NIGHT
MOSTLY CLEAR. PATCHY FOG AFTER MIDNIGHT. LOWS
1 TO 16.
SATURDAY
PATCHY FOG IN THE MORNING. SUNNY. HIGHS 25 TO 36.
WIND CHILLS AS LOW AS 10 BELOW IN THE MORNING.
SATURDAY NIGHT
CLEAR. LOWS 2 TO 17.
SUNDAY AND SUNDAY NIGHT
MOSTLY CLEAR. HIGHS 28 TO 39. LOWS
7 TO 22.
MONDAY THROUGH TUESDAY NIGHT
PARTLY CLOUDY. HIGHS 32 TO 44.
LOWS 13 TO 28.
WEDNESDAY
PARTLY CLOUDY WITH A 20 PERCENT CHANCE OF SNOW.
HIGHS 36 TO 47.
TEMPERATURE
IDAHO CITY 17 37 17 38
=
IDZ028-220500-
CAMAS PRAIRIE-
209 PM MST WED JAN 21 2026
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST /5 AM
MST/ FRIDAY...
TONIGHT
MOSTLY CLEAR. LOWS 15 TO 20. LIGHT WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS 30 TO 35. LIGHT WINDS.
THURSDAY NIGHT
INCREASING CLOUDS. LOWS 15 TO 20. LIGHT WINDS.
FRIDAY
PARTLY SUNNY IN THE MORNING, THEN CLEARING. HIGHS 34 TO
39. WEST WINDS UP TO 10 MPH.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS 11 TO 16. SOUTHWEST WINDS UP
TO 10 MPH.
SATURDAY
SUNNY. HIGHS 28 TO 33.
SATURDAY NIGHT
CLEAR. LOWS 9 TO 14.
SUNDAY AND SUNDAY NIGHT
MOSTLY CLEAR. HIGHS 34 TO 39. LOWS
12 TO 17.
MONDAY AND MONDAY NIGHT
PARTLY CLOUDY. HIGHS 35 TO 40. LOWS
16 TO 21.
TUESDAY
SUNNY. HIGHS 38 TO 43.
TUESDAY NIGHT AND WEDNESDAY
PARTLY CLOUDY. LOWS 18 TO 23.
HIGHS 41 TO 46.
TEMPERATURE
FAIRFIELD 15 32 15 36
=
IDZ033-220500-
UPPER WEISER RIVER-
209 PM MST WED JAN 21 2026
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST /5 AM
MST/ FRIDAY...
TONIGHT
INCREASING CLOUDS. PATCHY FOG AFTER MIDNIGHT. LOWS
17 TO 22. LIGHT WINDS.
THURSDAY
CLOUDY. HIGHS 26 TO 31. LIGHT WINDS.
THURSDAY NIGHT
CLOUDY. LOWS 19 TO 24. LIGHT WINDS.
FRIDAY
DECREASING CLOUDS. HIGHS 33 TO 38. NORTH WINDS 10 TO
15 MPH.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS 18 TO 23. NORTH WINDS 10 TO
15 MPH.
SATURDAY THROUGH SUNDAY
MOSTLY CLEAR. HIGHS 33 TO 39. LOWS
16 TO 21.
SUNDAY NIGHT
INCREASING CLOUDS. LOWS 19 TO 24.
MONDAY AND MONDAY NIGHT
MOSTLY CLOUDY. HIGHS 35 TO 40. LOWS
22 TO 27.
TUESDAY AND TUESDAY NIGHT
PARTLY CLOUDY. HIGHS 37 TO 43. LOWS
24 TO 29.
WEDNESDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF RAIN AND SNOW.
CHANCE OF PRECIPITATION 20 PERCENT. HIGHS 39 TO 45.
TEMPERATURE
COUNCIL 18 29 21 37
CAMBRIDGE 20 30 22 37
=
ORZ064-220500-
OREGON LOWER TREASURE VALLEY-
209 PM MST WED JAN 21 2026 /109 PM PST WED JAN 21 2026/
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST /5 AM
MST/ FRIDAY...
TONIGHT
CLOUDY. LOWS 21 TO 26. LIGHT WINDS.
THURSDAY
CLOUDY. HIGHS 29 TO 34. LIGHT WINDS.
THURSDAY NIGHT
CLOUDY. LOWS 22 TO 27. LIGHT WINDS.
FRIDAY
MOSTLY CLOUDY IN THE MORNING, THEN CLEARING. HIGHS
37 TO 42. NORTHWEST WINDS AROUND 10 MPH.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS 20 TO 25. NORTHWEST WINDS
AROUND 10 MPH.
SATURDAY THROUGH SUNDAY
MOSTLY CLEAR. HIGHS 35 TO 40. LOWS
18 TO 23.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS 20 TO 25.
MONDAY
PARTLY SUNNY. HIGHS 34 TO 39.
MONDAY NIGHT THROUGH TUESDAY NIGHT
PARTLY CLOUDY. LOWS 21 TO
28. HIGHS 39 TO 44.
WEDNESDAY
PARTLY SUNNY. HIGHS 39 TO 44.
TEMPERATURE
ONTARIO 25 32 26 39
=
IDZ012-220500-
LOWER TREASURE VALLEY-
209 PM MST WED JAN 21 2026
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST /5 AM
MST/ FRIDAY...
TONIGHT
CLOUDY. PATCHY FOG. LOWS 21 TO 26. LIGHT WINDS.
THURSDAY
PATCHY FOG IN THE MORNING. CLOUDY. HIGHS 29 TO 34.
LIGHT WINDS.
THURSDAY NIGHT
CLOUDY. LOWS 22 TO 27. LIGHT WINDS.
FRIDAY
DECREASING CLOUDS. PATCHY FOG IN THE MORNING. HIGHS
35 TO 40. NORTHWEST WINDS 10 TO 15 MPH.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS 20 TO 25. NORTHWEST WINDS
10 TO 15 MPH.
SATURDAY THROUGH SUNDAY
MOSTLY CLEAR. HIGHS 34 TO 41. LOWS
18 TO 23.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS 20 TO 25.
MONDAY AND MONDAY NIGHT
MOSTLY CLOUDY. HIGHS 36 TO 41. LOWS
23 TO 28.
TUESDAY AND TUESDAY NIGHT
PARTLY CLOUDY. HIGHS 39 TO 44. LOWS
24 TO 29.
WEDNESDAY
PARTLY SUNNY. HIGHS 41 TO 46.
TEMPERATURE
CALDWELL 25 32 26 37
=
IDZ014-220500-
UPPER TREASURE VALLEY-
209 PM MST WED JAN 21 2026
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST /5 AM
MST/ FRIDAY...
TONIGHT
MOSTLY CLOUDY. PATCHY FOG THIS EVENING. AREAS OF FOG
AFTER MIDNIGHT. LOWS 21 TO 26. LIGHT WINDS.
THURSDAY
PATCHY FOG IN THE MORNING. MOSTLY CLOUDY. HIGHS 29 TO
34. LIGHT WINDS.
THURSDAY NIGHT
CLOUDY. LOWS 22 TO 27. LIGHT WINDS.
FRIDAY
DECREASING CLOUDS. HIGHS 32 TO 37. LIGHT WINDS IN THE
MORNING, BECOMING NORTHWEST 10 TO 15 MPH IN THE AFTERNOON.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS 17 TO 22. NORTHWEST WINDS
10 TO 15 MPH.
SATURDAY
SUNNY. HIGHS 33 TO 38.
SATURDAY NIGHT
CLEAR. LOWS 16 TO 21.
SUNDAY
SUNNY. HIGHS 37 TO 42.
SUNDAY NIGHT
INCREASING CLOUDS. LOWS 19 TO 24.
MONDAY
PARTLY SUNNY. HIGHS 38 TO 43.
MONDAY NIGHT THROUGH TUESDAY NIGHT
PARTLY CLOUDY. LOWS 21 TO
29. HIGHS 41 TO 46.
WEDNESDAY
PARTLY SUNNY. HIGHS 43 TO 48.
TEMPERATURE
BOISE 24 32 25 35
MOUNTAIN HOME 23 32 24 35
=
IDZ016-220500-
WESTERN MAGIC VALLEY-
209 PM MST WED JAN 21 2026
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST /5 AM
MST/ FRIDAY...
TONIGHT
PARTLY CLOUDY. PATCHY FOG AFTER MIDNIGHT. LOWS 19 TO
25. LIGHT WINDS.
THURSDAY
DECREASING CLOUDS. PATCHY FOG IN THE MORNING. HIGHS
29 TO 34. LIGHT WINDS.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS 21 TO 27. LIGHT WINDS.
FRIDAY
MOSTLY CLOUDY. HIGHS 30 TO 35. WEST WINDS UP TO 10 MPH.
FRIDAY NIGHT
PARTLY CLOUDY. LOWS 16 TO 21. WEST WINDS UP TO
10 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS 30 TO 35.
SATURDAY NIGHT THROUGH SUNDAY NIGHT
MOSTLY CLEAR. LOWS 17 TO
24. HIGHS 35 TO 40.
MONDAY THROUGH TUESDAY NIGHT
PARTLY CLOUDY. HIGHS 38 TO 45.
LOWS 22 TO 28.
WEDNESDAY
PARTLY SUNNY. HIGHS 43 TO 48.
TEMPERATURE
JEROME 21 31 23 30
TWIN FALLS 20 32 21 31
=
IDZ029-220500-
OWYHEE MOUNTAINS-
209 PM MST WED JAN 21 2026
TONIGHT
PARTLY CLOUDY. LOWS 17 TO 24.
THURSDAY
PARTLY SUNNY IN THE MORNING, THEN CLEARING. HIGHS
31 TO 41.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS 18 TO 25.
FRIDAY
MOSTLY SUNNY. HIGHS 30 TO 38.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS 12 TO 20.
SATURDAY
SUNNY. HIGHS 32 TO 37.
SATURDAY NIGHT
CLEAR. LOWS 17 TO 23.
SUNDAY
SUNNY. HIGHS 35 TO 43.
SUNDAY NIGHT
INCREASING CLOUDS. LOWS 21 TO 26.
MONDAY
PARTLY SUNNY. HIGHS 35 TO 45.
MONDAY NIGHT THROUGH TUESDAY NIGHT
PARTLY CLOUDY. LOWS 23 TO
30. HIGHS 39 TO 48.
WEDNESDAY
PARTLY SUNNY. HIGHS 40 TO 50.
=
IDZ015-220500-
SOUTHWEST HIGHLANDS-
209 PM MST WED JAN 21 2026
TONIGHT
PATCHY FOG THIS EVENING. PARTLY CLOUDY. LOWS 19 TO 25.
THURSDAY
MOSTLY SUNNY. HIGHS 36 TO 46.
THURSDAY NIGHT
INCREASING CLOUDS. LOWS 20 TO 25.
FRIDAY
MOSTLY CLOUDY IN THE MORNING, THEN BECOMING PARTLY
SUNNY. HIGHS 32 TO 42.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS 10 TO 16.
SATURDAY
SUNNY. HIGHS 31 TO 37.
SATURDAY NIGHT
CLEAR. LOWS 13 TO 19.
SUNDAY
SUNNY. HIGHS 39 TO 44.
SUNDAY NIGHT
INCREASING CLOUDS. LOWS 18 TO 23.
MONDAY
PARTLY SUNNY. HIGHS 41 TO 46.
MONDAY NIGHT THROUGH WEDNESDAY
PARTLY CLOUDY. LOWS 20 TO 28.
HIGHS 44 TO 52.
=
IDZ030-220500-
SOUTHERN TWIN FALLS COUNTY-
209 PM MST WED JAN 21 2026
TONIGHT
PARTLY CLOUDY. LOWS 17 TO 22.
THURSDAY
MOSTLY SUNNY. HIGHS 33 TO 42.
THURSDAY NIGHT
INCREASING CLOUDS. LOWS 18 TO 23.
FRIDAY
MOSTLY CLOUDY IN THE MORNING, THEN BECOMING PARTLY
SUNNY. HIGHS 31 TO 36.
FRIDAY NIGHT
PARTLY CLOUDY. LOWS 12 TO 17.
SATURDAY
MOSTLY SUNNY. HIGHS 30 TO 35. WIND CHILLS AS LOW AS
ZERO.
SATURDAY NIGHT
CLEAR. LOWS 15 TO 20.
SUNDAY AND SUNDAY NIGHT
MOSTLY CLEAR. HIGHS 38 TO 43. LOWS
19 TO 24.
MONDAY THROUGH WEDNESDAY
PARTLY CLOUDY. HIGHS 41 TO 51. LOWS
22 TO 28.
=
ORZ062-220500-
BAKER COUNTY-
109 PM PST WED JAN 21 2026
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST /5 AM
MST/ FRIDAY...
TONIGHT
INCREASING CLOUDS. LOWS 14 TO 22. LIGHT WINDS.
THURSDAY
MOSTLY CLOUDY IN THE MORNING, THEN BECOMING PARTLY
SUNNY. HIGHS 29 TO 34. LIGHT WINDS.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS 16 TO 23. NORTHWEST WINDS
UP TO 10 MPH.
FRIDAY
MOSTLY SUNNY. HIGHS 32 TO 38. NORTHWEST WINDS 10 TO
15 MPH. GUSTS TO 25 MPH IN THE AFTERNOON.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS 14 TO 20. NORTHWEST WINDS
10 TO 15 MPH.
SATURDAY
SUNNY. HIGHS 34 TO 39. WIND CHILLS AS LOW AS ZERO IN
THE MORNING.
SATURDAY NIGHT AND SUNDAY
MOSTLY CLEAR. LOWS 12 TO 20. HIGHS
35 TO 40.
SUNDAY NIGHT
INCREASING CLOUDS. LOWS 17 TO 23.
MONDAY
PARTLY SUNNY. HIGHS 35 TO 40.
MONDAY NIGHT THROUGH TUESDAY NIGHT
PARTLY CLOUDY. LOWS 21 TO
29. HIGHS 39 TO 44.
WEDNESDAY
PARTLY CLOUDY WITH A SLIGHT CHANCE OF SNOW, MIXED
WITH RAIN IN THE AFTERNOON. CHANCE OF PRECIPITATION 20 PERCENT.
HIGHS 40 TO 45.
TEMPERATURE
BAKER CITY 19 33 20 36
=
ORZ061-220500-
HARNEY COUNTY-
109 PM PST WED JAN 21 2026
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST /5 AM
MST/ FRIDAY...
TONIGHT
MOSTLY CLOUDY. LOWS 11 TO 22. LIGHT WINDS.
THURSDAY
MOSTLY SUNNY. HIGHS 38 TO 44. LIGHT WINDS.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS 13 TO 24. NORTHWEST WINDS
UP TO 10 MPH.
FRIDAY
MOSTLY SUNNY. HIGHS 38 TO 43. NORTHWEST WINDS 10 TO
15 MPH.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS 11 TO 18. NORTH WINDS UP TO
10 MPH.
SATURDAY
PATCHY FOG IN THE MORNING. SUNNY. HIGHS 36 TO 41.
SATURDAY NIGHT AND SUNDAY
MOSTLY CLEAR. LOWS 8 TO 20. HIGHS
42 TO 47.
SUNDAY NIGHT
INCREASING CLOUDS. LOWS 16 TO 26.
MONDAY
PARTLY SUNNY. HIGHS 43 TO 48.
MONDAY NIGHT THROUGH TUESDAY NIGHT
PARTLY CLOUDY. LOWS 17 TO
29. HIGHS 45 TO 50.
WEDNESDAY
PARTLY SUNNY. HIGHS 45 TO 50.
TEMPERATURE
BURNS 11 42 13 41
=
ORZ063-220500-
MALHEUR COUNTY-
209 PM MST WED JAN 21 2026 /109 PM PST WED JAN 21 2026/
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST /5 AM
MST/ FRIDAY...
TONIGHT
MOSTLY CLOUDY. PATCHY FOG AFTER MIDNIGHT. LOWS 16 TO
23. LIGHT WINDS.
THURSDAY
DECREASING CLOUDS. HIGHS 29 TO 39. LIGHT WINDS.
THURSDAY NIGHT
MOSTLY CLOUDY. LOWS 17 TO 24. LIGHT WINDS.
FRIDAY
DECREASING CLOUDS. HIGHS 34 TO 39. NORTH WINDS 10 TO
15 MPH.
FRIDAY NIGHT
MOSTLY CLEAR. LOWS 11 TO 21. NORTH WINDS 10 TO
15 MPH.
SATURDAY THROUGH SUNDAY
MOSTLY CLEAR. HIGHS 35 TO 45. LOWS
12 TO 22.
SUNDAY NIGHT
PARTLY CLOUDY. LOWS 16 TO 24.
MONDAY
PARTLY SUNNY. HIGHS 36 TO 46.
MONDAY NIGHT THROUGH TUESDAY NIGHT
PARTLY CLOUDY. LOWS 20 TO
27. HIGHS 39 TO 49.
WEDNESDAY
PARTLY SUNNY. HIGHS 39 TO 49.
=
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