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

54°F

12°C

Humidity 28%
Wind Speed S 14 mph
Barometer 29.58 in (1001.7 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 24 Feb 4:54 pm CST
Extended Forecast for

Jerseyville IL

  • 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 20 mph.

    Low: 32 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 50. North wind 3 to 6 mph.

    High: 50 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 34. East wind 5 to 8 mph.

    Low: 34 °F

    Chance Rain

  • Thursday

    Thursday: A 20 percent chance of rain before noon. Partly sunny, with a high near 50. East wind 5 to 8 mph becoming west in the afternoon.

    High: 50 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 33. Light and variable wind becoming southwest around 6 mph after midnight.

    Low: 33 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 65.

    High: 65 °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

  • Saturday Night

    Saturday Night: A slight chance of rain and snow. Partly cloudy, with a low around 29. Chance of precipitation is 20%.

    Low: 29 °F

    Slight Chance
    Rain/Snow

Detailed Forecast

Tonight
Mostly cloudy, with a low around 32. Southwest wind 5 to 13 mph becoming northwest after midnight. Winds could gust as high as 20 mph.
Wednesday
Partly sunny, with a high near 50. North wind 3 to 6 mph.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 34. East wind 5 to 8 mph.
Thursday
A 20 percent chance of rain before noon. Partly sunny, with a high near 50. East wind 5 to 8 mph becoming west in the afternoon.
Thursday Night
Mostly clear, with a low around 33. Light and variable wind becoming southwest around 6 mph after midnight.
Friday
Sunny, with a high near 65.
Friday Night
Mostly clear, with a low around 38.
Saturday
Sunny, with a high near 63.
Saturday Night
A slight chance of rain and snow. Partly cloudy, with a low around 29. Chance of precipitation is 20%.
Sunday
A chance of rain and snow, mainly after noon. Mostly cloudy, with a high near 44. Chance of precipitation is 30%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 30. Chance of precipitation is 50%.
Monday
A 30 percent chance of rain. Mostly cloudy, with a high near 47.
Monday Night
A 40 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 31.
Tuesday
A 50 percent chance of rain. Mostly cloudy, with a high near 49.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Jerseyville IL
 39.11°N 90.32°W (Elev. 630 ft)
Last Update:
3:36 pm CST Feb 24, 2026
Forecast Valid:
5pm CST Feb 24, 2026-6pm CST Mar 3, 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