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

86°F

30°C

Humidity 42%
Wind Speed S 7 mph
Barometer 30.20 in (1022.1 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 3 Oct 12:54 pm CDT
Extended Forecast for

3 Miles E Dow IL

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms. Sunny, with a high near 89. South wind around 7 mph.

    High: 89 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 62. South wind around 5 mph.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 87. South wind 5 to 11 mph.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 59. South wind 6 to 9 mph.

    Low: 59 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 87. South wind 7 to 14 mph, with gusts as high as 21 mph.

    High: 87 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 61.

    Low: 61 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 89. South wind around 7 mph.
Tonight
Mostly clear, with a low around 62. South wind around 5 mph.
Saturday
Sunny, with a high near 87. South wind 5 to 11 mph.
Saturday Night
Clear, with a low around 59. South wind 6 to 9 mph.
Sunday
Sunny, with a high near 87. South wind 7 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Clear, with a low around 61.
Monday
Sunny, with a high near 88.
Monday Night
A 20 percent chance of showers after 1am. Mostly clear, with a low around 63.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 55.
Wednesday
Sunny, with a high near 74.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Dow IL
 39.04°N 90.27°W (Elev. 600 ft)
Last Update:
11:56 am CDT Oct 3, 2025
Forecast Valid:
1pm CDT Oct 3, 2025-6pm CDT Oct 9, 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