Fairfield, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Fairfield, IL in one place.
A chance of showers and thunderstorms between 10am and 3pm, then showers and thunderstorms likely between 3pm and 4pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 89. West wind 1 to 5 mph. Chance of precipitation is 60%.
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: Jul 17, 2026 10:10 AM CDT.
The active forecast window currently covers Jul 17 to Jul 23, 2026 for Fairfield, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 17 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 10:10 AM CDT
- Forecast office
- PAH
- Source
- NOAA / NWS
Daily Outlook
This Week in Fairfield
Tuesday looks like the warmest upcoming period in Fairfield at 93 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 64 degrees F.
The strongest winds are forecast for Tuesday at about 6 to 12 mph W.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 10:10 AM CDT
- Coverage
- 7 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
A chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 73. West southwest wind 1 to 5 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 91. West wind 3 to 9 mph. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 72. West northwest wind 1 to 7 mph. Chance of precipitation is 40%.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. North northeast wind around 3 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 68. Northeast wind 0 to 3 mph. Chance of precipitation is 20%.
Mostly sunny, with a high near 91. South wind 0 to 3 mph.
Partly cloudy, with a low around 74. South southwest wind around 6 mph.
Mostly sunny, with a high near 93. West wind 6 to 12 mph.
Mostly clear, with a low around 68. North northwest wind 6 to 10 mph.
Sunny, with a high near 84. North wind 6 to 9 mph.
Mostly clear, with a low around 64. North northeast wind 2 to 8 mph.
Sunny, with a high near 84. Northeast wind around 5 mph.
A slight chance of rain showers after 1am. Mostly clear, with a low around 64. Northeast wind around 5 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Jul 17
|
Chance Showers And Thunderstorms
|
89°F |
1 to 5 mph
W
|
|
Tonight
Jul 17
|
Chance Showers And Thunderstorms then Partly Cloudy
|
73°F |
1 to 5 mph
WSW
|
|
Saturday
Jul 18
|
Mostly Sunny then Chance Showers And Thunderstorms
|
91°F |
3 to 9 mph
W
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms
|
72°F |
1 to 7 mph
WNW
|
|
Sunday
Jul 19
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
89°F |
3 mph
NNE
|
|
Sunday Night
Jul 19
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
68°F |
0 to 3 mph
NE
|
|
Monday
Jul 20
|
Mostly Sunny
|
91°F |
0 to 3 mph
S
|
|
Monday Night
Jul 20
|
Partly Cloudy
|
74°F |
6 mph
SSW
|
|
Tuesday
Jul 21
|
Mostly Sunny
|
93°F |
6 to 12 mph
W
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
68°F |
6 to 10 mph
NNW
|
|
Wednesday
Jul 22
|
Sunny
|
84°F |
6 to 9 mph
N
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
64°F |
2 to 8 mph
NNE
|
|
Thursday
Jul 23
|
Sunny
|
84°F |
5 mph
NE
|
|
Thursday Night
Jul 23
|
Mostly Clear then Slight Chance Rain Showers
|
64°F |
5 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fairfield.
