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

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

70°F

21°C

Humidity 60%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 29 Sep 9:52 am CDT
Extended Forecast for

Dowell IL

  • Today

    Today: Sunny, with a high near 84. Calm wind becoming south around 5 mph in the afternoon.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 60. Light south southeast wind.

    Low: 60 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly sunny, with a high near 89. Light south southeast wind becoming south 6 to 11 mph in the morning.

    High: 89 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 67. South wind 5 to 7 mph.

    Low: 67 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 90. South southwest wind 8 to 15 mph, with gusts as high as 20 mph.

    High: 90 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. South wind 3 to 5 mph. Chance of precipitation is 40%.

    Low: 67 °F

    Chance
    Showers

  • Friday

    Friday: Showers likely. Mostly cloudy, with a high near 79. South wind 5 to 10 mph becoming north in the afternoon. Chance of precipitation is 70%.

    High: 79 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers. Mostly cloudy, with a low around 59. North northeast wind 6 to 9 mph.

    Low: 59 °F

    Chance
    Showers

  • Saturday

    Saturday: A chance of showers. Mostly cloudy, with a high near 72. Northeast wind 6 to 9 mph.

    High: 72 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 84. Calm wind becoming south around 5 mph in the afternoon.
Tonight
Increasing clouds, with a low around 60. Light south southeast wind.
Wednesday
Mostly sunny, with a high near 89. Light south southeast wind becoming south 6 to 11 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 67. South wind 5 to 7 mph.
Thursday
Partly sunny, with a high near 90. South southwest wind 8 to 15 mph, with gusts as high as 20 mph.
Thursday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. South wind 3 to 5 mph. Chance of precipitation is 40%.
Friday
Showers likely. Mostly cloudy, with a high near 79. South wind 5 to 10 mph becoming north in the afternoon. Chance of precipitation is 70%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 59. North northeast wind 6 to 9 mph.
Saturday
A chance of showers. Mostly cloudy, with a high near 72. Northeast wind 6 to 9 mph.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 59. Northeast wind 3 to 6 mph.
Sunday
A slight chance of showers. Partly sunny, with a high near 72. North wind 6 to 11 mph.
Sunday Night
Mostly clear, with a low around 52. North wind 5 to 7 mph.
Monday
Sunny, with a high near 71. Northeast wind 6 to 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Dowell IL
 37.95°N 89.25°W
Last Update:
9:16 am CDT Sep 29, 2026
Forecast Valid:
11am CDT Sep 29, 2026-6pm CDT Oct 5, 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