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

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

73°F

23°C

Humidity 71%
Wind Speed N 3 mph
Barometer 30.06 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 22 Jul 7:55 pm CDT
Extended Forecast for

Colp IL

  • Tonight

    Tonight: Partly cloudy, with a low around 63. Northeast wind 3 to 6 mph.

    Low: 63 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 82. East northeast wind 3 to 7 mph.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 62. East northeast wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers. Mostly cloudy, with a high near 82. Light east northeast wind.

    High: 82 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Light east wind.

    Low: 66 °F

    Chance
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 88. Calm wind becoming south around 5 mph in the afternoon.

    High: 88 °F

    Chance
    T-storms

  • Saturday Night

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

    Low: 73 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 95. Light and variable wind.

    High: 95 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 75 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 63. Northeast wind 3 to 6 mph.
Thursday
Sunny, with a high near 82. East northeast wind 3 to 7 mph.
Thursday Night
Mostly cloudy, with a low around 62. East northeast wind around 5 mph becoming calm in the evening.
Friday
A 20 percent chance of showers. Mostly cloudy, with a high near 82. Light east northeast wind.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Light east wind.
Saturday
A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 88. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 73. Light south wind.
Sunday
Mostly sunny, with a high near 95. Light and variable wind.
Sunday Night
Mostly clear, with a low around 75. Light south southwest wind.
Monday
Sunny and hot, with a high near 98. South southwest wind 5 to 9 mph.
Monday Night
Mostly clear, with a low around 76. Southwest wind 5 to 8 mph.
Tuesday
Sunny, with a high near 96. West wind 5 to 9 mph.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 73. West northwest wind 5 to 8 mph becoming calm after midnight.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 92. Calm wind becoming north 5 to 8 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Colp IL
 37.81°N 89.08°W
Last Update:
5:11 pm CDT Jul 22, 2026
Forecast Valid:
8pm CDT Jul 22, 2026-6pm CDT Jul 29, 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