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

Hazardous Weather Conditions

Current conditions at

Fairfield, Fairfield Municipal Airport (KFWC)

Lat: 38.38°NLon: 88.41°WElev: 436ft.

Fair

74°F

23°C

Humidity 95%
Wind Speed Calm
Barometer 29.88 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 26 Jul 9:35 pm CDT
Extended Forecast for

3 Miles NE Sims IL

Extreme Heat Warning until July 28, 07:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning until July 28, 07:00pm

    NOW until 7:00pm Tue

    Extreme Heat Warning

  • Tonight

    Low: 75 °F

    Severe
    Thunderstorms

  • Monday

    Monday: Sunny, with a high near 96. Heat index values as high as 110. Calm wind becoming south southwest 5 to 8 mph in the afternoon.

    High: 96 °F

    Sunny

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms between 2am and 3am. Mostly clear, with a low around 77. South southwest wind 5 to 7 mph. Chance of precipitation is 20%.

    Low: 77 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: Sunny, with a high near 91. North wind 6 to 10 mph.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66. North wind 3 to 8 mph.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86. North wind 3 to 8 mph.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 65. North northeast wind around 6 mph becoming calm in the evening.

    Low: 65 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 87. Light east northeast wind.

    High: 87 °F

    Sunny

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly before 2am. Some of the storms could be severe. Partly cloudy, with a low around 75. Calm wind.
Monday
Sunny, with a high near 96. Heat index values as high as 110. Calm wind becoming south southwest 5 to 8 mph in the afternoon.
Monday Night
A slight chance of showers and thunderstorms between 2am and 3am. Mostly clear, with a low around 77. South southwest wind 5 to 7 mph. Chance of precipitation is 20%.
Tuesday
Sunny, with a high near 91. North wind 6 to 10 mph.
Tuesday Night
Mostly clear, with a low around 66. North wind 3 to 8 mph.
Wednesday
Sunny, with a high near 86. North wind 3 to 8 mph.
Wednesday Night
Mostly clear, with a low around 65. North northeast wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 87. Light east northeast wind.
Thursday Night
Partly cloudy, with a low around 67. Calm wind.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Light and variable wind.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 83. Calm wind becoming northeast 5 to 8 mph in the morning.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67. North wind 3 to 7 mph.
Sunday
A slight chance of showers and thunderstorms. Sunny, with a high near 86. North northeast wind 3 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NE Sims IL
 38.41°N 88.48°W
Last Update:
9:11 pm CDT Jul 26, 2026
Forecast Valid:
9pm CDT Jul 26, 2026-6pm CDT Aug 2, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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