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

32°F

0°C

Humidity 85%
Wind Speed E 3 mph
Barometer 29.95 in (1014.3 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 13 Jan 3:54 am CST
Extended Forecast for

Dow IL

  • Today

    Today: Increasing clouds, with a high near 60. West wind 9 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 11pm. Mostly cloudy, with a low around 34. West wind 9 to 14 mph, with gusts as high as 22 mph.

    Low: 34 °F

    Chance Rain

  • Wednesday

    Wednesday: Partly sunny, with a temperature falling to around 30 by 5pm. Breezy, with a north wind 15 to 22 mph, with gusts as high as 32 mph.

    High: 37 °F⇓

    Partly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 16. North wind 9 to 16 mph, with gusts as high as 24 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 temperature rising to around 33 by 2am.

    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 28.

    High: 28 °F

    Mostly Cloudy

Detailed Forecast

Today
Increasing clouds, with a high near 60. West wind 9 to 15 mph, with gusts as high as 26 mph.
Tonight
A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 34. West wind 9 to 14 mph, with gusts as high as 22 mph.
Wednesday
Partly sunny, with a temperature falling to around 30 by 5pm. Breezy, with a north wind 15 to 22 mph, with gusts as high as 32 mph.
Wednesday Night
Mostly clear, with a low around 16. North wind 9 to 16 mph, with gusts as high as 24 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 temperature rising to around 33 by 2am.
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 28.
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 11.
M.L.King Day
Mostly sunny, with a high near 33.
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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:
4:31 am CST Jan 13, 2026
Forecast Valid:
4am CST Jan 13, 2026-6pm CST Jan 19, 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