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

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

39°F

4°C

Humidity 60%
Wind Speed E 5 mph
Barometer 29.91 in (1012.8 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 13 Jan 5:54 am CST
Extended Forecast for

3 Miles SSW Dow IL

  • Today

    Today: Increasing clouds, with a high near 60. West wind 7 to 15 mph, with gusts as high as 26 mph.

    High: 60 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A 40 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 35. West wind 9 to 14 mph, with gusts as high as 21 mph.

    Low: 35 °F

    Chance Rain

  • Wednesday

    Wednesday: Partly sunny, with a temperature falling to around 30 by 5pm. Breezy, with a north wind 15 to 21 mph, with gusts as high as 31 mph.

    High: 38 °F⇓

    Partly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 16. North wind 9 to 15 mph, with gusts as high as 23 mph.

    Low: 16 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 32. Northwest wind 7 to 9 mph becoming south in the afternoon.

    High: 32 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Chance Snow

  • Friday

    Friday: Partly sunny, with a high near 42. Breezy.

    High: 42 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: A slight chance of rain and snow before midnight. Mostly cloudy, with a low around 20. Chance of precipitation is 20%.

    Low: 20 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 29.

    High: 29 °F

    Mostly Cloudy

Detailed Forecast

Today
Increasing clouds, with a high near 60. West wind 7 to 15 mph, with gusts as high as 26 mph.
Tonight
A 40 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 35. West wind 9 to 14 mph, with gusts as high as 21 mph.
Wednesday
Partly sunny, with a temperature falling to around 30 by 5pm. Breezy, with a north wind 15 to 21 mph, with gusts as high as 31 mph.
Wednesday Night
Mostly clear, with a low around 16. North wind 9 to 15 mph, with gusts as high as 23 mph.
Thursday
Mostly sunny, with a high near 32. Northwest wind 7 to 9 mph becoming south in the afternoon.
Thursday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 27.
Friday
Partly sunny, with a high near 42. Breezy.
Friday Night
A slight chance of rain and snow before midnight. Mostly cloudy, with a low around 20. Chance of precipitation is 20%.
Saturday
Mostly cloudy, with a high near 29.
Saturday Night
Mostly cloudy, with a low around 9.
Sunday
Mostly sunny, with a high near 23.
Sunday Night
Partly cloudy, with a low around 12.
M.L.King Day
Mostly sunny, with a high near 33.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Dow IL
 39°N 90.33°W (Elev. 597 ft)
Last Update:
5:21 am CST Jan 13, 2026
Forecast Valid:
6am CST Jan 13, 2026-6pm CST Jan 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation