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

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fog/Mist

47°F

8°C

Humidity 100%
Wind Speed NE 3 mph
Barometer 29.94 in (1013.8 mb)
Dewpoint 47°F (8°C)
Visibility 6.00 mi
Last update 27 Dec 12:52 am CST
Extended Forecast for

Dowell IL

Dense Fog Advisory until December 27, 09:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until December 27, 09:00am

    NOW until 9:00am Sat

    Dense Fog Advisory

  • Overnight

    Low: 47 °F

    Patchy Dense
    Fog

  • Saturday

    Saturday: Patchy dense fog before 9am. Otherwise, mostly cloudy, with a high near 65. Southeast wind 6 to 9 mph.

    High: 65 °F

    Patchy Dense
    Fog then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: Cloudy, with a temperature falling to near 61 by 8pm, then rising to around 66 during the remainder of the night. South southwest wind 9 to 13 mph, with gusts as high as 20 mph.

    Low: 61 °F⇑

    Cloudy

  • Sunday

    Sunday: Showers likely, mainly after 4pm. Mostly cloudy, with a high near 72. Breezy, with a south southwest wind 11 to 21 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

    High: 72 °F

    Mostly Cloudy
    then Showers
    Likely and
    Breezy

  • Sunday Night

    Sunday Night: Showers, mainly before 9pm. Low around 22. Breezy, with a southwest wind 22 to 24 mph becoming west northwest in the evening. Winds could gust as high as 33 mph. Chance of precipitation is 90%.

    Low: 22 °F

    Showers and
    Breezy then
    Slight Chance
    Showers and
    Blustery

  • Monday

    Monday: Mostly sunny, with a high near 29. Blustery, with a west northwest wind 18 to 22 mph, with gusts as high as 32 mph.

    High: 29 °F

    Mostly Sunny
    and Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around 19. Northwest wind 10 to 17 mph, with gusts as high as 24 mph.

    Low: 19 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 34. Northwest wind 6 to 10 mph becoming west southwest in the afternoon.

    High: 34 °F

    Sunny

Detailed Forecast

Overnight
Patchy dense fog after 2am. Otherwise, mostly cloudy, with a low around 47. Northeast wind 3 to 5 mph.
Saturday
Patchy dense fog before 9am. Otherwise, mostly cloudy, with a high near 65. Southeast wind 6 to 9 mph.
Saturday Night
Cloudy, with a temperature falling to near 61 by 8pm, then rising to around 66 during the remainder of the night. South southwest wind 9 to 13 mph, with gusts as high as 20 mph.
Sunday
Showers likely, mainly after 4pm. Mostly cloudy, with a high near 72. Breezy, with a south southwest wind 11 to 21 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Sunday Night
Showers, mainly before 9pm. Low around 22. Breezy, with a southwest wind 22 to 24 mph becoming west northwest in the evening. Winds could gust as high as 33 mph. Chance of precipitation is 90%.
Monday
Mostly sunny, with a high near 29. Blustery, with a west northwest wind 18 to 22 mph, with gusts as high as 32 mph.
Monday Night
Partly cloudy, with a low around 19. Northwest wind 10 to 17 mph, with gusts as high as 24 mph.
Tuesday
Sunny, with a high near 34. Northwest wind 6 to 10 mph becoming west southwest in the afternoon.
Tuesday Night
Mostly clear, with a low around 25. Southwest wind 5 to 7 mph.
Wednesday
Mostly sunny, with a high near 44. West wind 7 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 26. West southwest wind 6 to 8 mph becoming northwest after midnight.
New Year's Day
Mostly sunny, with a high near 37. North northwest wind 7 to 10 mph.
Thursday Night
Partly cloudy, with a low around 17. North northwest wind 3 to 6 mph.
Friday
Partly sunny, with a high near 34. North northwest wind 5 to 7 mph becoming northeast in the afternoon.
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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:
1:11 am CST Dec 27, 2025
Forecast Valid:
1am CST Dec 27, 2025-6pm CST Jan 2, 2026
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation