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

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

97°F

36°C

Humidity 42%
Wind Speed S 9 mph
Barometer 29.93 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index104°F (40°C)
Last update 3 Sep 5:45 pm CDT
Extended Forecast for

Christopher IL

Extreme Heat Warning September 3, 06:46pm until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 3, 06:46pm until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Tonight

    Low: 75 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 101. Heat index values as high as 109. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 101 °F

    Hot

  • Friday Night

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

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 100. Heat index values as high as 107. Calm wind becoming west northwest around 6 mph in the afternoon.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 71. Calm wind.

    Low: 71 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 96. Light northeast wind increasing to 6 to 11 mph in the morning.

    High: 96 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 67. East northeast wind 5 to 11 mph.

    Low: 67 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 94. East northeast wind 5 to 8 mph.

    High: 94 °F

    Sunny

Detailed Forecast

Tonight
Clear, with a low around 75. Calm wind.
Friday
Sunny and hot, with a high near 101. Heat index values as high as 109. Calm wind becoming southwest around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 76. Calm wind.
Saturday
Sunny and hot, with a high near 100. Heat index values as high as 107. Calm wind becoming west northwest around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 71. Calm wind.
Sunday
Sunny, with a high near 96. Light northeast wind increasing to 6 to 11 mph in the morning.
Sunday Night
Mostly clear, with a low around 67. East northeast wind 5 to 11 mph.
Labor Day
Sunny, with a high near 94. East northeast wind 5 to 8 mph.
Monday Night
Mostly clear, with a low around 69. East wind around 6 mph becoming calm in the evening.
Tuesday
Sunny and hot, with a high near 97. Calm wind becoming south 5 to 8 mph in the morning.
Tuesday Night
Mostly clear, with a low around 74. South wind 6 to 8 mph.
Wednesday
Sunny and hot, with a high near 99. Southwest wind 8 to 11 mph.
Wednesday Night
Mostly clear, with a low around 75. South southwest wind around 8 mph.
Thursday
A slight chance of showers. Mostly sunny, with a high near 95. Southwest wind 9 to 13 mph becoming west northwest in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Christopher IL
 37.98°N 89.05°W
Last Update:
6:21 pm CDT Sep 3, 2026
Forecast Valid:
6pm CDT Sep 3, 2026-6pm CDT Sep 10, 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