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

62°F

17°C

Humidity 93%
Wind Speed Calm
Barometer 30.06 in (1017.6 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 6 Oct 1:54 am CDT
Extended Forecast for

5 Miles W Dow IL

  • Overnight

    Overnight: Mostly clear, with a low around 63. Southeast wind around 6 mph.

    Low: 63 °F

    Mostly Clear

  • Monday

    Monday: Isolated showers, then scattered showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. South wind around 7 mph. Chance of precipitation is 30%.

    High: 85 °F

    Scattered
    Showers

  • Monday Night

    Monday Night: Scattered showers and thunderstorms. Increasing clouds, with a low around 64. South wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 40%.

    Low: 64 °F

    Scattered
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 71. North wind 6 to 11 mph.

    High: 71 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 49. North wind 6 to 10 mph.

    Low: 49 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 46.

    Low: 46 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 63. Southeast wind around 6 mph.
Monday
Isolated showers, then scattered showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. South wind around 7 mph. Chance of precipitation is 30%.
Monday Night
Scattered showers and thunderstorms. Increasing clouds, with a low around 64. South wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 40%.
Tuesday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 71. North wind 6 to 11 mph.
Tuesday Night
Partly cloudy, with a low around 49. North wind 6 to 10 mph.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Clear, with a low around 46.
Thursday
Sunny, with a high near 72.
Thursday Night
Mostly clear, with a low around 49.
Friday
Mostly sunny, with a high near 75.
Friday Night
Mostly clear, with a low around 50.
Saturday
Sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 52.
Sunday
Sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles W Dow IL
 39.05°N 90.41°W (Elev. 600 ft)
Last Update:
10:41 pm CDT Oct 5, 2025
Forecast Valid:
2am CDT Oct 6, 2025-6pm CDT Oct 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