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.

Partly Cloudy

91°F

33°C

Humidity 62%
Wind Speed S 12 mph
Barometer 30.00 in
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 29 Jun 2:35 pm CDT
Extended Forecast for

Sims IL

Extreme Heat Warning June 29, 02:57pm until July 3, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 29, 02:57pm until July 3, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • This Afternoon

    High: 94 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 73. South wind 3 to 8 mph.

    Low: 73 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 95. Heat index values as high as 107. Calm wind becoming south southwest 5 to 7 mph in the morning.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 73. South wind around 6 mph becoming calm in the evening.

    Low: 73 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 95. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 95 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75. Light south wind.

    Low: 75 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 95. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 95 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 74. Light and variable wind.

    Low: 74 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 94. Heat index values as high as 106. South southwest wind around 11 mph.
Tonight
Partly cloudy, with a low around 73. South wind 3 to 8 mph.
Tuesday
Sunny, with a high near 95. Heat index values as high as 107. Calm wind becoming south southwest 5 to 7 mph in the morning.
Tuesday Night
Clear, with a low around 73. South wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 95. Calm wind becoming south southwest around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 75. Light south wind.
Thursday
Sunny, with a high near 95. Calm wind becoming south southwest around 5 mph in the afternoon.
Thursday Night
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 74. Light and variable wind.
Friday
A chance of showers and thunderstorms. Sunny, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 73. Calm wind.
Independence Day
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. Calm wind.
Saturday Night
Partly cloudy, with a low around 73. Calm wind.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Light west southwest wind.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sims IL
 38.37°N 88.54°W
Last Update:
2:11 pm CDT Jun 29, 2026
Forecast Valid:
2pm CDT Jun 29, 2026-6pm CDT Jul 5, 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