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.

Overcast

76°F

24°C

Humidity 69%
Wind Speed NE 10 mph
Barometer 30.13 in (1019.7 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 31 Jul 4:54 pm CDT
Extended Forecast for

Jerseyville IL

  • Tonight

    Tonight: Widespread haze before 9pm, then widespread haze after 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 60. Northeast wind 7 to 14 mph, with gusts as high as 21 mph.

    Low: 60 °F

    Haze

  • Friday

    Friday: Sunny, with a high near 79. Northeast wind 8 to 11 mph.

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 57. Northeast wind 6 to 9 mph.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 77. Northeast wind 6 to 8 mph.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 57. Northeast wind 3 to 6 mph.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81.

    High: 81 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 20%.

    Low: 66 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Widespread haze before 9pm, then widespread haze after 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 60. Northeast wind 7 to 14 mph, with gusts as high as 21 mph.
Friday
Sunny, with a high near 79. Northeast wind 8 to 11 mph.
Friday Night
Mostly clear, with a low around 57. Northeast wind 6 to 9 mph.
Saturday
Sunny, with a high near 77. Northeast wind 6 to 8 mph.
Saturday Night
Partly cloudy, with a low around 57. Northeast wind 3 to 6 mph.
Sunday
Sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 63.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 20%.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 67.
Wednesday
Sunny, with a high near 85.
Wednesday Night
Mostly clear, with a low around 68.
Thursday
Mostly sunny, with a high near 86.
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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:
4:16 pm CDT Jul 31, 2025
Forecast Valid:
5pm CDT Jul 31, 2025-6pm CDT Aug 7, 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