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

29°F

-2°C

Humidity 85%
Wind Speed NE 5 mph
Barometer 30.02 in (1016.7 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 13 Jan 1:54 am CST
Extended Forecast for

3 Miles E Dow IL

  • Overnight

    Overnight: Mostly clear early, then becoming mostly cloudy, with a low around 34. South wind 3 to 8 mph. Winds could gust as high as 20 mph.

    Low: 34 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: 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

  • Tuesday Night

    Tuesday Night: 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 21 mph.

    Low: 34 °F

    Chance Rain

  • Wednesday

    Wednesday: Partly sunny, with a temperature falling to around 30 by 5pm. Breezy, with a north wind 14 to 20 mph, with gusts as high as 31 mph.

    High: 37 °F⇓

    Partly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 16. Northwest wind 8 to 15 mph, with gusts as high as 23 mph.

    Low: 16 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 32.

    High: 32 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 26.

    Low: 26 °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

Detailed Forecast

Overnight
Mostly clear early, then becoming mostly cloudy, with a low around 34. South wind 3 to 8 mph. Winds could gust as high as 20 mph.
Tuesday
Increasing clouds, with a high near 60. West wind 9 to 15 mph, with gusts as high as 26 mph.
Tuesday Night
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 21 mph.
Wednesday
Partly sunny, with a temperature falling to around 30 by 5pm. Breezy, with a north wind 14 to 20 mph, with gusts as high as 31 mph.
Wednesday Night
Mostly clear, with a low around 16. Northwest wind 8 to 15 mph, with gusts as high as 23 mph.
Thursday
Mostly sunny, with a high near 32.
Thursday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 26.
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
Partly sunny, 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 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:
3 Miles E Dow IL
 39.04°N 90.24°W (Elev. 600 ft)
Last Update:
2:41 am CST Jan 13, 2026
Forecast Valid:
2am 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