Fairfield, ID Weather Forecast
Local 7-day forecast
Patchy Fog then Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Fairfield, ID in one place.
Patchy fog between 7am and 8am. Sunny, with a high near 76. East northeast wind around 2 mph.
Local Weather Overview
This forecast page for Fairfield, ID is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Sep 22, 2026 12:20 AM MDT.
The active forecast window currently covers Sep 23 to Sep 28, 2026 for Fairfield, ID.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 23 to Sep 28, 2026
- Latest sync
- Sep 22, 2026 12:20 AM MDT
- Forecast office
- BOI
- Source
- NOAA / NWS
Daily Outlook
This Week in Fairfield
Thursday looks like the warmest upcoming period in Fairfield at 80 degrees F.
Sunday Night is the coolest period ahead with temperatures near 34 degrees F.
The strongest winds are forecast for Friday at about 7 to 17 mph NW.
The forecast from Sep 23 through Sep 28 stays mostly dry.
Forecast Details
- Last updated
- Sep 22, 2026 12:20 AM MDT
- Coverage
- 6 days
- Time zone
- America/Boise
- Forecast office
- BOI
- Radar station
- KCBX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 45. East wind 3 to 8 mph.
Sunny, with a high near 80.
Partly cloudy, with a low around 46.
Mostly sunny, with a high near 74.
Partly cloudy, with a low around 38.
Mostly sunny, with a high near 68.
Partly cloudy, with a low around 36.
Mostly sunny, with a high near 69.
Partly cloudy, with a low around 34.
Sunny, with a high near 66.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 23
|
Patchy Fog then Sunny
|
76°F |
2 mph
ENE
|
|
Wednesday Night
Sep 23
|
Mostly Clear
|
45°F |
3 to 8 mph
E
|
|
Thursday
Sep 24
|
Sunny
|
80°F |
6 to 15 mph
E
|
|
Thursday Night
Sep 24
|
Partly Cloudy
|
46°F |
9 to 14 mph
ENE
|
|
Friday
Sep 25
|
Mostly Sunny
|
74°F |
7 to 17 mph
NW
|
|
Friday Night
Sep 25
|
Partly Cloudy
|
38°F |
5 to 15 mph
NW
|
|
Saturday
Sep 26
|
Mostly Sunny
|
68°F |
3 to 9 mph
WSW
|
|
Saturday Night
Sep 26
|
Partly Cloudy
|
36°F |
1 to 9 mph
NW
|
|
Sunday
Sep 27
|
Mostly Sunny
|
69°F |
1 to 9 mph
NW
|
|
Sunday Night
Sep 27
|
Partly Cloudy
|
34°F |
5 to 13 mph
WNW
|
|
Monday
Sep 28
|
Sunny
|
66°F |
5 to 14 mph
WNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fairfield.
Nearby forecast pages are not available for this location yet.