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

24°F

-4°C

Humidity 48%
Wind Speed NW 8 mph
Barometer 30.60 in (1036.8 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill15°F (-9°C)
Last update 23 Feb 10:54 am CST
Extended Forecast for

2 Miles WNW Elsah IL

  • Today

    Today: Sunny, with a high near 31. Northwest wind 6 to 10 mph.

    High: 31 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 19. Calm wind becoming south 5 to 7 mph after midnight.

    Low: 19 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 56. Southeast wind 8 to 17 mph becoming southwest in the afternoon. Winds could gust as high as 36 mph.

    High: 56 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 33. Southwest wind 5 to 10 mph becoming light and variable after midnight.

    Low: 33 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 52. Northwest wind around 6 mph becoming southeast in the afternoon.

    High: 52 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 36. Chance of precipitation is 60%.

    Low: 36 °F

    Chance Rain
    then Rain
    Likely

  • Thursday

    Thursday: A 30 percent chance of rain before noon. Partly sunny, with a high near 48.

    High: 48 °F

    Chance Rain
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 31. Northwest wind 6 to 10 mph.
Tonight
Mostly clear, with a low around 19. Calm wind becoming south 5 to 7 mph after midnight.
Tuesday
Mostly cloudy, with a high near 56. Southeast wind 8 to 17 mph becoming southwest in the afternoon. Winds could gust as high as 36 mph.
Tuesday Night
Mostly cloudy, with a low around 33. Southwest wind 5 to 10 mph becoming light and variable after midnight.
Wednesday
Mostly sunny, with a high near 52. Northwest wind around 6 mph becoming southeast in the afternoon.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 36. Chance of precipitation is 60%.
Thursday
A 30 percent chance of rain before noon. Partly sunny, with a high near 48.
Thursday Night
Mostly clear, with a low around 30.
Friday
Sunny, with a high near 63.
Friday Night
Mostly clear, with a low around 39.
Saturday
Mostly sunny, with a high near 64.
Saturday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 33. Chance of precipitation is 20%.
Sunday
A chance of rain and snow. Partly sunny, with a high near 49. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Elsah IL
 38.96°N 90.39°W (Elev. 407 ft)
Last Update:
10:26 am CST Feb 23, 2026
Forecast Valid:
11am CST Feb 23, 2026-6pm CST Mar 1, 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