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

89°F

32°C

Humidity 68%
Wind Speed S 9 mph
Barometer 30.02 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 29 Jun 12:35 pm CDT
Extended Forecast for

Fairfield IL

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

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • This Afternoon

    High: 94 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 74. South wind 3 to 8 mph.

    Low: 74 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 95. Heat index values as high as 106. South southwest wind 3 to 7 mph.

    High: 95 °F

    Sunny

  • Tuesday Night

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

    Low: 73 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 96. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 96 °F

    Sunny

  • Wednesday Night

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

    Low: 75 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 96. Light south southwest wind.

    High: 96 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. Calm wind.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny, with a high near 94. South wind around 9 mph.
Tonight
Partly cloudy, with a low around 74. South wind 3 to 8 mph.
Tuesday
Sunny, with a high near 95. Heat index values as high as 106. South southwest wind 3 to 7 mph.
Tuesday Night
Clear, with a low around 73. South southwest wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 96. Calm wind becoming south southwest around 5 mph in the afternoon.
Wednesday Night
Clear, with a low around 75. Light south wind.
Thursday
Sunny, with a high near 96. Light south southwest wind.
Thursday Night
Mostly clear, with a low around 76. Calm wind.
Friday
A slight chance of showers and thunderstorms. Sunny, with a high near 94. Light southwest wind.
Friday Night
Partly cloudy, with a low around 76. Calm wind.
Independence Day
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 93. Calm wind.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 74. Calm wind.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Calm wind becoming west southwest around 5 mph 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:
12:16 pm CDT Jun 29, 2026
Forecast Valid:
12pm 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