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

58°F

14°C

Humidity 50%
Wind Speed S 5 mph
Barometer 30.12 in
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 19 Mar 10:55 am CDT
Extended Forecast for

Fairfield IL

  • Today

    Today: Sunny, with a high near 70. South wind around 6 mph.

    High: 70 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 50. Calm wind becoming south around 5 mph after midnight.

    Low: 50 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 77. Southwest wind 6 to 9 mph.

    High: 77 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 50. Southwest wind around 6 mph becoming light and variable after midnight.

    Low: 50 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 77. Calm wind becoming west around 5 mph in the afternoon.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57. Calm wind becoming south southwest around 6 mph after midnight.

    Low: 57 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 82. South southwest wind 7 to 14 mph, with gusts as high as 22 mph.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers before 1am. Partly cloudy, with a low around 40. West southwest wind 11 to 14 mph becoming north after midnight. Winds could gust as high as 24 mph.

    Low: 40 °F

    Slight Chance
    Showers

  • Monday

    Monday: Sunny, with a high near 54. North wind 9 to 11 mph, with gusts as high as 22 mph.

    High: 54 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 70. South wind around 6 mph.
Tonight
Mostly clear, with a low around 50. Calm wind becoming south around 5 mph after midnight.
Friday
Mostly sunny, with a high near 77. Southwest wind 6 to 9 mph.
Friday Night
Partly cloudy, with a low around 50. Southwest wind around 6 mph becoming light and variable after midnight.
Saturday
Sunny, with a high near 77. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 57. Calm wind becoming south southwest around 6 mph after midnight.
Sunday
Sunny, with a high near 82. South southwest wind 7 to 14 mph, with gusts as high as 22 mph.
Sunday Night
A slight chance of showers before 1am. Partly cloudy, with a low around 40. West southwest wind 11 to 14 mph becoming north after midnight. Winds could gust as high as 24 mph.
Monday
Sunny, with a high near 54. North wind 9 to 11 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around 34. North northeast wind around 6 mph.
Tuesday
Partly sunny, with a high near 58. Southeast wind around 6 mph.
Tuesday Night
Mostly cloudy, with a low around 39. East wind 3 to 5 mph.
Wednesday
Mostly sunny, with a high near 67. East wind 6 to 9 mph becoming south in the afternoon.
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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:
8:32 am CDT Mar 19, 2026
Forecast Valid:
11am CDT Mar 19, 2026-6pm CDT Mar 25, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation