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

33°F

1°C

Humidity 64%
Wind Speed E 3 mph
Barometer 29.92 in (1013.5 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Last update 5 Dec 1:54 pm CST
Extended Forecast for

Elsah IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 38. East wind 6 to 8 mph.

    High: 38 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 26. Southeast wind 5 to 7 mph becoming west after midnight.

    Low: 26 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 37. Light and variable wind becoming east around 6 mph in the afternoon.

    High: 37 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of snow after midnight. Mostly cloudy, with a low around 29. Southeast wind around 7 mph.

    Low: 29 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: A chance of rain before 9am, then a chance of snow between 9am and noon. Mostly cloudy, with a high near 37. Southeast wind 6 to 14 mph becoming north in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 30%.

    High: 37 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 12.

    Low: 12 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 21.

    Low: 21 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 38. East wind 6 to 8 mph.
Tonight
Mostly cloudy, with a low around 26. Southeast wind 5 to 7 mph becoming west after midnight.
Saturday
Partly sunny, with a high near 37. Light and variable wind becoming east around 6 mph in the afternoon.
Saturday Night
A 40 percent chance of snow after midnight. Mostly cloudy, with a low around 29. Southeast wind around 7 mph.
Sunday
A chance of rain before 9am, then a chance of snow between 9am and noon. Mostly cloudy, with a high near 37. Southeast wind 6 to 14 mph becoming north in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 12.
Monday
Mostly sunny, with a high near 31.
Monday Night
Partly cloudy, with a low around 21.
Tuesday
Mostly sunny, with a high near 45.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 20.
Thursday
Mostly cloudy, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Elsah IL
 38.93°N 90.36°W (Elev. 407 ft)
Last Update:
1:56 pm CST Dec 5, 2025
Forecast Valid:
2pm CST Dec 5, 2025-6pm CST Dec 11, 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