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

61°F

16°C

Humidity 78%
Wind Speed SE 3 mph
Barometer 30.12 in (1019.7 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 9 Oct 8:54 am CDT
Extended Forecast for

3 Miles E Elsah IL

  • Today

    Today: Sunny, with a high near 89. Light east wind becoming south 5 to 10 mph in the morning.

    High: 89 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. Southeast wind 5 to 8 mph.

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 83. Southeast wind 5 to 9 mph.

    High: 83 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 57. East wind 5 to 9 mph becoming light northeast after midnight.

    Low: 57 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 84. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 90.

    High: 90 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 89. Light east wind becoming south 5 to 10 mph in the morning.
Tonight
Mostly clear, with a low around 59. Southeast wind 5 to 8 mph.
Saturday
Increasing clouds, with a high near 83. Southeast wind 5 to 9 mph.
Saturday Night
Mostly cloudy, with a low around 57. East wind 5 to 9 mph becoming light northeast after midnight.
Sunday
Sunny, with a high near 84. Calm wind becoming northwest around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 60.
Columbus Day
Sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 67.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 90.
Tuesday Night
A 20 percent chance of showers after 1am. Mostly clear, with a low around 62.
Wednesday
A 50 percent chance of showers. Partly sunny, with a high near 84.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Elsah IL
 38.95°N 90.3°W (Elev. 449 ft)
Last Update:
9:21 am CDT Oct 9, 2026
Forecast Valid:
9am CDT Oct 9, 2026-6pm CDT Oct 15, 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