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.

Partly Cloudy

72°F

22°C

Humidity 83%
Wind Speed NE 5 mph
Barometer 29.95 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 21 Sep 6:47 am CDT
Extended Forecast for

Colp IL

  • Today

    Today: A slight chance of showers and thunderstorms between 1pm and 2pm. Partly sunny, with a high near 84. North wind 3 to 7 mph. Chance of precipitation is 20%.

    High: 84 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: Mostly cloudy, with a low around 62. North northeast wind 5 to 7 mph.

    Low: 62 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 77. North northeast wind 7 to 10 mph.

    High: 77 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 57. North northeast wind 5 to 10 mph.

    Low: 57 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 76. North wind 6 to 10 mph.

    High: 76 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 55. North northeast wind 5 to 8 mph becoming calm in the evening.

    Low: 55 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 77. Light north northeast wind increasing to 5 to 9 mph in the morning.

    High: 77 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56. North northeast wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 77. Northeast wind 3 to 8 mph.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers and thunderstorms between 1pm and 2pm. Partly sunny, with a high near 84. North wind 3 to 7 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 62. North northeast wind 5 to 7 mph.
Tuesday
Partly sunny, with a high near 77. North northeast wind 7 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 57. North northeast wind 5 to 10 mph.
Wednesday
Mostly sunny, with a high near 76. North wind 6 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 55. North northeast wind 5 to 8 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 77. Light north northeast wind increasing to 5 to 9 mph in the morning.
Thursday Night
Mostly clear, with a low around 56. North northeast wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 77. Northeast wind 3 to 8 mph.
Friday Night
Partly cloudy, with a low around 55. Northeast wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 76. Calm wind becoming east northeast around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 55. Calm wind.
Sunday
Mostly sunny, with a high near 82. Calm wind becoming northeast around 5 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Colp IL
 37.81°N 89.08°W
Last Update:
6:07 am CDT Sep 21, 2026
Forecast Valid:
7am CDT Sep 21, 2026-6pm CDT Sep 27, 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