National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Fairfield, Fairfield Municipal Airport (KFWC)

Lat: 38.38°NLon: 88.41°WElev: 436ft.

Fair

34°F

1°C

Humidity 61%
Wind Speed S 6 mph
Barometer 30.05 in
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 4 Jan 10:15 pm CST
Extended Forecast for

Fairfield IL

  • Tonight

    Tonight: Mostly clear, with a low around 27. South southwest wind around 6 mph.

    Low: 27 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 54. Southwest wind 6 to 8 mph.

    High: 54 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44. South wind 6 to 10 mph, with gusts as high as 22 mph.

    Low: 44 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 62. West wind 6 to 11 mph, with gusts as high as 22 mph.

    High: 62 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 36. Light west northwest wind.

    Low: 36 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 58. Light and variable wind.

    High: 58 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 45. Calm wind becoming south around 6 mph after midnight.

    Low: 45 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: Showers likely. Mostly cloudy, with a high near 60. South wind 6 to 8 mph.

    High: 60 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely, mainly before midnight. Mostly cloudy, with a low around 46. South wind 6 to 9 mph.

    Low: 46 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 27. South southwest wind around 6 mph.
Monday
Mostly sunny, with a high near 54. Southwest wind 6 to 8 mph.
Monday Night
Partly cloudy, with a low around 44. South wind 6 to 10 mph, with gusts as high as 22 mph.
Tuesday
Mostly sunny, with a high near 62. West wind 6 to 11 mph, with gusts as high as 22 mph.
Tuesday Night
Partly cloudy, with a low around 36. Light west northwest wind.
Wednesday
Partly sunny, with a high near 58. Light and variable wind.
Wednesday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 45. Calm wind becoming south around 6 mph after midnight.
Thursday
Showers likely. Mostly cloudy, with a high near 60. South wind 6 to 8 mph.
Thursday Night
Showers likely, mainly before midnight. Mostly cloudy, with a low around 46. South wind 6 to 9 mph.
Friday
A chance of showers. Partly sunny, with a high near 56. South wind 8 to 11 mph becoming west in the afternoon. Winds could gust as high as 18 mph.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 34. West wind around 8 mph.
Saturday
Mostly sunny, with a high near 45. West wind 8 to 11 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 24. West northwest wind around 8 mph.
Sunday
Mostly sunny, with a high near 39. West northwest wind 6 to 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fairfield IL
 38.38°N 88.37°W
Last Update:
9:51 pm CST Jan 4, 2026
Forecast Valid:
10pm CST Jan 4, 2026-6pm CST Jan 11, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation