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

38°F

3°C

Humidity 66%
Wind Speed NE 7 mph
Barometer 30.41 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 24 Mar 12:55 am CDT
Extended Forecast for

Fairfield IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 35. East northeast wind around 6 mph.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 60. East southeast wind 5 to 7 mph.

    High: 60 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Cloudy, then gradually becoming partly cloudy, with a low around 43. Light east wind.

    Low: 43 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73. South southwest wind 3 to 8 mph.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 60. South wind 6 to 10 mph, with gusts as high as 21 mph.

    Low: 60 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Sunny, with a high near 84. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers before 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 44. South southwest wind around 14 mph becoming north after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 70%.

    Low: 44 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 52. North wind 13 to 15 mph, with gusts as high as 25 mph.

    High: 52 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Mostly clear, with a low around 30. North northeast wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 30 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 35. East northeast wind around 6 mph.
Tuesday
Mostly sunny, with a high near 60. East southeast wind 5 to 7 mph.
Tuesday Night
Cloudy, then gradually becoming partly cloudy, with a low around 43. Light east wind.
Wednesday
Mostly sunny, with a high near 73. South southwest wind 3 to 8 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 60. South wind 6 to 10 mph, with gusts as high as 21 mph.
Thursday
Sunny, with a high near 84. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.
Thursday Night
A chance of showers before 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 44. South southwest wind around 14 mph becoming north after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 70%.
Friday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 52. North wind 13 to 15 mph, with gusts as high as 25 mph.
Friday Night
Mostly clear, with a low around 30. North northeast wind 6 to 10 mph, with gusts as high as 18 mph.
Saturday
Sunny, with a high near 54. Northeast wind around 6 mph.
Saturday Night
Mostly clear, with a low around 36. Calm wind becoming southeast around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 64. South wind 5 to 8 mph.
Sunday Night
Mostly cloudy, with a low around 48. South wind 5 to 7 mph.
Monday
Mostly sunny, with a high near 73. South southwest wind 8 to 11 mph, with gusts as high as 20 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:
1:26 am CDT Mar 24, 2026
Forecast Valid:
2am CDT Mar 24, 2026-6pm CDT Mar 30, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation