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.

A Few Clouds

55°F

13°C

Humidity 47%
Wind Speed N 9 mph
Barometer 30.33 in (1027.0 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 6 Apr 9:54 am CDT
Extended Forecast for

Jerseyville IL

  • Today

    Today: Sunny, with a high near 59. Northwest wind 11 to 13 mph, with gusts as high as 21 mph.

    High: 59 °F

    Sunny

  • Tonight

    Tonight: A 30 percent chance of rain, mainly after 3am. Increasing clouds, with a low around 35. Northeast wind 8 to 14 mph, with gusts as high as 21 mph.

    Low: 35 °F

    Partly Cloudy
    then Chance
    Rain

  • Tuesday

    Tuesday: A 30 percent chance of rain, mainly before 7am. Mostly cloudy, with a high near 50. East wind around 11 mph.

    High: 50 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39. East wind around 11 mph, with gusts as high as 20 mph.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 70. South wind 13 to 17 mph, with gusts as high as 25 mph.

    High: 70 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 71. Chance of precipitation is 30%.

    High: 71 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    T-storms

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 70. Chance of precipitation is 50%.

    High: 70 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 59. Northwest wind 11 to 13 mph, with gusts as high as 21 mph.
Tonight
A 30 percent chance of rain, mainly after 3am. Increasing clouds, with a low around 35. Northeast wind 8 to 14 mph, with gusts as high as 21 mph.
Tuesday
A 30 percent chance of rain, mainly before 7am. Mostly cloudy, with a high near 50. East wind around 11 mph.
Tuesday Night
Mostly cloudy, with a low around 39. East wind around 11 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 70. South wind 13 to 17 mph, with gusts as high as 25 mph.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 71. Chance of precipitation is 30%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 70. Chance of precipitation is 50%.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 77.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79.
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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:
7:36 am CDT Apr 6, 2026
Forecast Valid:
10am CDT Apr 6, 2026-6pm CDT Apr 12, 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