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

31°F

-1°C

Humidity 49%
Wind Speed S 15 mph
Barometer 29.92 in (1013.7 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 24 Feb 8:54 am CST
Extended Forecast for

3 Miles WSW Jerseyville IL

  • Today

    Today: Mostly cloudy, with a high near 56. Breezy, with a south wind 16 to 21 mph becoming southwest in the afternoon. Winds could gust as high as 36 mph.

    High: 56 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 32. Southwest wind 5 to 13 mph becoming northwest after midnight. Winds could gust as high as 22 mph.

    Low: 32 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 50. Northwest wind around 6 mph becoming east in the afternoon.

    High: 50 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 34. East wind 6 to 9 mph. Chance of precipitation is 60%.

    Low: 34 °F

    Rain Likely

  • Thursday

    Thursday: A slight chance of rain, mixing with snow after 9am, then gradually ending. Partly sunny, with a high near 49. East wind 6 to 10 mph becoming north in the afternoon. Chance of precipitation is 20%.

    High: 49 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 56. Breezy, with a south wind 16 to 21 mph becoming southwest in the afternoon. Winds could gust as high as 36 mph.
Tonight
Mostly cloudy, with a low around 32. Southwest wind 5 to 13 mph becoming northwest after midnight. Winds could gust as high as 22 mph.
Wednesday
Mostly sunny, with a high near 50. Northwest wind around 6 mph becoming east in the afternoon.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 34. East wind 6 to 9 mph. Chance of precipitation is 60%.
Thursday
A slight chance of rain, mixing with snow after 9am, then gradually ending. Partly sunny, with a high near 49. East wind 6 to 10 mph becoming north in the afternoon. Chance of precipitation is 20%.
Thursday Night
Mostly clear, with a low around 31.
Friday
Sunny, with a high near 64.
Friday Night
Mostly clear, with a low around 38.
Saturday
Sunny, with a high near 63.
Saturday Night
Partly cloudy, with a low around 28.
Sunday
A chance of rain and snow. Partly sunny, with a high near 42. Chance of precipitation is 30%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.
Monday
A chance of rain and snow. Partly sunny, with a high near 46. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Jerseyville IL
 39.11°N 90.38°W (Elev. 600 ft)
Last Update:
6:46 am CST Feb 24, 2026
Forecast Valid:
9am CST Feb 24, 2026-6pm CST Mar 2, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation