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

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair and Breezy

45°F

7°C

Humidity 58%
Wind Speed W 21 G 36 mph
Barometer 29.99 in (1015.6 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 25 Nov 10:54 pm CST
Extended Forecast for

Dow IL

  • Tonight

    Tonight: Partly cloudy, with a low around 33. Breezy, with a west wind 18 to 22 mph, with gusts as high as 34 mph.

    Low: 33 °F

    Partly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 43. Breezy, with a west wind 16 to 25 mph, with gusts as high as 37 mph.

    High: 43 °F

    Becoming
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 25. Northwest wind 10 to 14 mph, with gusts as high as 22 mph.

    Low: 25 °F

    Increasing
    Clouds

  • Thanksgiving Day

    Thanksgiving Day: Sunny, with a high near 40. Northwest wind 9 to 13 mph, with gusts as high as 21 mph.

    High: 40 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 21. Northwest wind 3 to 7 mph.

    Low: 21 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Snow likely after midnight. Cloudy, with a low around 29. Chance of precipitation is 60%.

    Low: 29 °F

    Cloudy then
    Snow Likely

  • Saturday

    Saturday: Rain and snow. High near 37. Chance of precipitation is 80%.

    High: 37 °F

    Rain/Snow

  • Saturday Night

    Saturday Night: Rain likely, mainly before midnight. Cloudy, with a low around 26. Chance of precipitation is 60%.

    Low: 26 °F

    Rain Likely
    then Chance
    Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 33. Breezy, with a west wind 18 to 22 mph, with gusts as high as 34 mph.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 43. Breezy, with a west wind 16 to 25 mph, with gusts as high as 37 mph.
Wednesday Night
Increasing clouds, with a low around 25. Northwest wind 10 to 14 mph, with gusts as high as 22 mph.
Thanksgiving Day
Sunny, with a high near 40. Northwest wind 9 to 13 mph, with gusts as high as 21 mph.
Thursday Night
Mostly clear, with a low around 21. Northwest wind 3 to 7 mph.
Friday
Mostly sunny, with a high near 37.
Friday Night
Snow likely after midnight. Cloudy, with a low around 29. Chance of precipitation is 60%.
Saturday
Rain and snow. High near 37. Chance of precipitation is 80%.
Saturday Night
Rain likely, mainly before midnight. Cloudy, with a low around 26. Chance of precipitation is 60%.
Sunday
A slight chance of rain and snow. Mostly cloudy, with a high near 32. Chance of precipitation is 20%.
Sunday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 16.
Monday
A slight chance of rain and snow. Mostly cloudy, with a high near 28. Chance of precipitation is 20%.
Monday Night
Mostly cloudy, with a low around 17.
Tuesday
Partly sunny, with a high near 30.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Dow IL
 39.04°N 90.33°W (Elev. 623 ft)
Last Update:
10:41 pm CST Nov 25, 2025
Forecast Valid:
11pm CST Nov 25, 2025-6pm CST Dec 2, 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