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

38°F

3°C

Humidity 70%
Wind Speed E 3 mph
Barometer 30.25 in (1024.1 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 6 Nov 2:54 am CST
Extended Forecast for

3 Miles SW Dow IL

  • Overnight

    Overnight: Clear, with a low around 38. Northeast wind around 6 mph.

    Low: 38 °F

    Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 64. Southeast wind 6 to 16 mph, with gusts as high as 24 mph.

    High: 64 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: A slight chance of rain between 1am and 5am. Increasing clouds, with a low around 52. Southeast wind 11 to 13 mph becoming southwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 20%.

    Low: 52 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Friday

    Friday: Mostly cloudy through mid morning, then gradual clearing, with a high near 71. West wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 71 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 43. West wind 5 to 8 mph becoming calm after midnight.

    Low: 43 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of rain after noon. Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny
    then Chance
    Rain

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 32.

    Low: 32 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 40. Breezy.

    High: 40 °F

    Mostly Sunny
    and Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 23.

    Low: 23 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 38. Northeast wind around 6 mph.
Thursday
Increasing clouds, with a high near 64. Southeast wind 6 to 16 mph, with gusts as high as 24 mph.
Thursday Night
A slight chance of rain between 1am and 5am. Increasing clouds, with a low around 52. Southeast wind 11 to 13 mph becoming southwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 20%.
Friday
Mostly cloudy through mid morning, then gradual clearing, with a high near 71. West wind 10 to 14 mph, with gusts as high as 22 mph.
Friday Night
Mostly clear, with a low around 43. West wind 5 to 8 mph becoming calm after midnight.
Saturday
A 30 percent chance of rain after noon. Partly sunny, with a high near 64.
Saturday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 32.
Sunday
Mostly sunny, with a high near 40. Breezy.
Sunday Night
Mostly clear, with a low around 23.
Monday
Sunny, with a high near 42.
Monday Night
Mostly clear, with a low around 27.
Veterans Day
Mostly sunny, with a high near 59.
Tuesday Night
Partly cloudy, with a low around 40.
Wednesday
Sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Dow IL
 39.02°N 90.33°W (Elev. 650 ft)
Last Update:
3:16 am CST Nov 6, 2025
Forecast Valid:
3am CST Nov 6, 2025-6pm CST Nov 12, 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