Fairfield, IL Weather Forecast
Local 7-day forecast
Slight Chance Rain Showers then Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Fairfield, IL in one place.
A slight chance of rain showers before 7am. Partly sunny. High near 58, with temperatures falling to around 56 in the afternoon. Northwest wind 16 to 22 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Fairfield, IL 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: Oct 15, 2026 5:26 PM CDT.
The active forecast window currently covers Oct 16 to Oct 21, 2026 for Fairfield, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 16 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 5:26 PM CDT
- Forecast office
- PAH
- Source
- NOAA / NWS
Daily Outlook
This Week in Fairfield
Wednesday looks like the warmest upcoming period in Fairfield at 77 degrees F.
Saturday Night is the coolest period ahead with temperatures near 35 degrees F.
The strongest winds are forecast for Friday at about 16 to 22 mph NW.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Oct 15, 2026 5:26 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- PAH
- Radar station
- KVWX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 40. North northwest wind 10 to 18 mph, with gusts as high as 24 mph.
Sunny, with a high near 60. North northeast wind 3 to 9 mph.
Areas of frost after 4am. Clear, with a low around 35. Northeast wind around 2 mph.
Areas of frost before 8am. Sunny, with a high near 67. Southeast wind 1 to 5 mph.
Clear, with a low around 39. Southeast wind around 2 mph.
Sunny, with a high near 72. South southeast wind 0 to 3 mph.
Partly cloudy, with a low around 44. East wind around 1 mph.
Mostly sunny, with a high near 75. East wind around 2 mph.
Mostly clear, with a low around 46. Northeast wind around 1 mph.
Sunny, with a high near 77. East northeast wind around 2 mph.
Clear, with a low around 47. North northeast wind around 1 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Oct 16
|
Slight Chance Rain Showers then Partly Sunny
|
58°F |
16 to 22 mph
NW
|
|
Friday Night
Oct 16
|
Partly Cloudy
|
40°F |
10 to 18 mph
NNW
|
|
Saturday
Oct 17
|
Sunny
|
60°F |
3 to 9 mph
NNE
|
|
Saturday Night
Oct 17
|
Clear then Areas Of Frost
|
35°F |
2 mph
NE
|
|
Sunday
Oct 18
|
Areas Of Frost then Sunny
|
67°F |
1 to 5 mph
SE
|
|
Sunday Night
Oct 18
|
Clear
|
39°F |
2 mph
SE
|
|
Monday
Oct 19
|
Sunny
|
72°F |
0 to 3 mph
SSE
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
44°F |
1 mph
E
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
75°F |
2 mph
E
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
46°F |
1 mph
NE
|
|
Wednesday
Oct 21
|
Sunny
|
77°F |
2 mph
ENE
|
|
Wednesday Night
Oct 21
|
Clear
|
47°F |
1 mph
NNE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fairfield.
