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

67°F

19°C

Humidity 58%
Wind Speed N 5 mph
Barometer 30.17 in
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 31 Aug 8:35 pm CDT
Extended Forecast for

Colp IL

  • Tonight

    Tonight: Partly cloudy, with a low around 56. Northeast wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Mostly sunny, with a high near 85. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 85 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 62. Northeast wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 81 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers. Partly cloudy, with a low around 59. Light and variable wind.

    Low: 59 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 85. Calm wind becoming west southwest around 6 mph in the afternoon.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 57. West southwest wind around 6 mph. Chance of precipitation is 40%.

    Low: 57 °F

    Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 77. Northwest wind 6 to 10 mph.

    High: 77 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 52. Northwest wind around 6 mph becoming calm in the evening.

    Low: 52 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 56. Northeast wind around 5 mph becoming calm in the evening.
Labor Day
Mostly sunny, with a high near 85. Calm wind becoming east northeast around 5 mph in the afternoon.
Monday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 62. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Calm wind becoming east northeast around 5 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 59. Light and variable wind.
Wednesday
Sunny, with a high near 85. Calm wind becoming west southwest around 6 mph in the afternoon.
Wednesday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 57. West southwest wind around 6 mph. Chance of precipitation is 40%.
Thursday
A slight chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 77. Northwest wind 6 to 10 mph.
Thursday Night
Mostly clear, with a low around 52. Northwest wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 84. Light and variable wind becoming west 5 to 10 mph in the morning.
Friday Night
Mostly clear, with a low around 53. West northwest wind 3 to 6 mph.
Saturday
Sunny, with a high near 81. Northwest wind 3 to 8 mph.
Saturday Night
Mostly clear, with a low around 52. North northwest wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 81. Calm wind becoming north northeast 5 to 7 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Colp IL
 37.81°N 89.08°W
Last Update:
5:46 pm CDT Aug 31, 2025
Forecast Valid:
8pm CDT Aug 31, 2025-6pm CDT Sep 7, 2025
 
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