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

79°F

26°C

Humidity 74%
Wind Speed S 3 mph
Barometer 29.96 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 4 Sep 2:13 am CDT
Extended Forecast for

Christopher IL

Extreme Heat Warning September 4, 02:38am until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 4, 02:38am until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Overnight

    Low: 75 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 101. Heat index values as high as 109. Calm wind becoming west southwest around 5 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 101. Heat index values as high as 108. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 101 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 73. Calm wind.

    Low: 73 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 95. Light north northeast wind increasing to 6 to 11 mph in the morning.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 66. Northeast wind 5 to 10 mph becoming light east northeast after midnight.

    Low: 66 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 93. East northeast wind 5 to 7 mph.

    High: 93 °F

    Sunny

Detailed Forecast

Overnight
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 west southwest around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 76. Calm wind.
Saturday
Sunny and hot, with a high near 101. Heat index values as high as 108. Calm wind becoming northwest around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 73. Calm wind.
Sunday
Sunny, with a high near 95. Light north northeast wind increasing to 6 to 11 mph in the morning.
Sunday Night
Mostly clear, with a low around 66. Northeast wind 5 to 10 mph becoming light east northeast after midnight.
Labor Day
Sunny, with a high near 93. East northeast wind 5 to 7 mph.
Monday Night
Mostly clear, with a low around 68. 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 7 mph in the morning.
Tuesday Night
Mostly clear, with a low around 74. South southeast wind 5 to 8 mph.
Wednesday
Sunny and hot, with a high near 100. Southwest wind 8 to 13 mph.
Wednesday Night
Mostly clear, with a low around 76. South wind around 8 mph.
Thursday
A slight chance of showers and thunderstorms. Sunny and hot, with a high near 97. West wind 8 to 13 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Christopher IL
 37.98°N 89.05°W
Last Update:
1:26 am CDT Sep 4, 2026
Forecast Valid:
2am CDT Sep 4, 2026-6pm CDT Sep 10, 2026
 
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Additional Resources

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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