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

94°F

34°C

Humidity 40%
Wind Speed S 6 mph
Barometer 30.00 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 1 Sep 6:15 pm CDT
Extended Forecast for

Grayville IL

Extreme Heat Warning until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Tonight

    Low: 75 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 76. South wind around 6 mph becoming calm in the evening.

    Low: 76 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 99. Heat index values as high as 105. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. Light and variable wind.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 99. Light and variable wind.

    High: 99 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers and thunderstorms, mainly after 1pm. Sunny and hot, with a high near 97. Calm wind.

    High: 97 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Clear, with a low around 75. Calm wind becoming south around 5 mph.
Wednesday
Sunny and hot, with a high near 99. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Wednesday Night
Clear, with a low around 76. South wind around 6 mph becoming calm in the evening.
Thursday
Sunny and hot, with a high near 99. Heat index values as high as 105. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 76. Light and variable wind.
Friday
Sunny and hot, with a high near 99. Light and variable wind.
Friday Night
Mostly clear, with a low around 74. Calm wind.
Saturday
A chance of showers and thunderstorms, mainly after 1pm. Sunny and hot, with a high near 97. Calm wind.
Saturday Night
A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 71. Calm wind.
Sunday
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 93. Calm wind becoming north northeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 69. Northeast wind around 5 mph becoming calm in the evening.
Labor Day
A slight chance of showers. Sunny, with a high near 91. Calm wind becoming east around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 67. East wind around 5 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 90. Calm wind becoming south around 6 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grayville IL
 38.25°N 87.98°W
Last Update:
5:56 pm CDT Sep 1, 2026
Forecast Valid:
6pm CDT Sep 1, 2026-6pm CDT Sep 8, 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