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

62°F

17°C

Humidity 90%
Wind Speed NE 3 mph
Barometer 30.14 in (1020.0 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 4 Oct 2:54 am CDT
Extended Forecast for

Jerseyville IL

  • Overnight

    Overnight: Clear, with a low around 62. South wind around 6 mph.

    Low: 62 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 85. South wind 5 to 11 mph.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 58. South wind 6 to 8 mph.

    Low: 58 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 85. South wind 7 to 15 mph.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 62. South wind 6 to 8 mph.

    Low: 62 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 84.

    High: 84 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 62.

    Low: 62 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 77.

    High: 77 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 62. South wind around 6 mph.
Saturday
Sunny, with a high near 85. South wind 5 to 11 mph.
Saturday Night
Clear, with a low around 58. South wind 6 to 8 mph.
Sunday
Sunny, with a high near 85. South wind 7 to 15 mph.
Sunday Night
Mostly clear, with a low around 62. South wind 6 to 8 mph.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 84.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 62.
Tuesday
A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 54.
Wednesday
Sunny, with a high near 74.
Wednesday Night
Mostly clear, with a low around 50.
Thursday
Sunny, with a high near 74.
Thursday Night
Mostly clear, with a low around 50.
Friday
Sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Jerseyville IL
 39.13°N 90.32°W (Elev. 614 ft)
Last Update:
10:31 pm CDT Oct 3, 2025
Forecast Valid:
2am CDT Oct 4, 2025-6pm CDT Oct 10, 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