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

74°F

23°C

Humidity 63%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 27 Aug 7:55 pm CDT
Extended Forecast for

Fairfield IL

  • Tonight

    Tonight: Mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86. Calm wind becoming north northeast around 6 mph in the afternoon.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 61. Light northeast wind.

    Low: 61 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 88. Light and variable wind.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 93. Calm wind becoming south southwest 5 to 9 mph in the morning.

    High: 93 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 70. South wind 3 to 6 mph.

    Low: 70 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 95. South southwest wind 5 to 10 mph.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 73. South wind 3 to 7 mph.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 63. Calm wind.
Friday
Sunny, with a high near 86. Calm wind becoming north northeast around 6 mph in the afternoon.
Friday Night
Clear, with a low around 61. Light northeast wind.
Saturday
Sunny, with a high near 88. Light and variable wind.
Saturday Night
Mostly clear, with a low around 65. Calm wind.
Sunday
Sunny, with a high near 93. Calm wind becoming south southwest 5 to 9 mph in the morning.
Sunday Night
Mostly clear, with a low around 70. South wind 3 to 6 mph.
Monday
Sunny, with a high near 95. South southwest wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 73. South wind 3 to 7 mph.
Tuesday
Sunny, with a high near 96. Southwest wind 3 to 7 mph.
Tuesday Night
Mostly clear, with a low around 75. South southwest wind around 6 mph becoming calm in the evening.
Wednesday
Sunny and hot, with a high near 97. Calm wind becoming southwest 5 to 7 mph in the morning.
Wednesday Night
Mostly clear, with a low around 75. Light south southwest wind.
Thursday
A slight chance of showers and thunderstorms. Sunny and hot, with a high near 97. Calm wind becoming west southwest 5 to 7 mph in the morning.
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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:
8:06 pm CDT Aug 27, 2026
Forecast Valid:
8pm CDT Aug 27, 2026-6pm CDT Sep 3, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation