Showers and Storms continue across the East; Heat, Critical Fire Weather, Drought, and Poor Air Quality continues in the West

A series of fronts will focus locally heavy showers and storms across portions of the central and eastern U.S. through the end of the workweek. Dangerous to extreme heat continues across the Southwest U.S., eventually spreading eastward over the weekend into early next week. Elevated fire weather conditions continue across the Great Basin, with degraded air quality lingering across the Northwest. Read More >

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

68°F

20°C

Humidity 93%
Wind Speed E 7 mph
Barometer 30.00 in (1015.4 mb)
Dewpoint 66°F (19°C)
Visibility 9.00 mi
Last update 5 Aug 3:54 am CDT
Extended Forecast for

3 Miles SW Jerseyville IL

  • Today

    Today: Scattered showers and thunderstorms, mainly after 4pm.  Mostly sunny, with a high near 89. South wind 5 to 8 mph.  Chance of precipitation is 30%.

    High: 89 °F

    Mostly Sunny
    then
    Scattered
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms, mainly after 3am.  Low around 68. Northwest wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 80%.

    Low: 68 °F

    Scattered
    T-storms then
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms, mainly before noon.  High near 83. Light and variable wind becoming southwest around 6 mph.  Chance of precipitation is 80%.

    High: 83 °F

    T-storms then
    Isolated
    T-storms

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 68. Light southeast wind.

    Low: 68 °F

    Chance
    T-storms

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 85. Southwest wind 3 to 7 mph.

    High: 85 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am.  Partly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms after 1am.  Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

Detailed Forecast

Today
Scattered showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 89. South wind 5 to 8 mph. Chance of precipitation is 30%.
Tonight
Showers and thunderstorms, mainly after 3am. Low around 68. Northwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 80%.
Thursday
Showers and thunderstorms, mainly before noon. High near 83. Light and variable wind becoming southwest around 6 mph. Chance of precipitation is 80%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Light southeast wind.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. Southwest wind 3 to 7 mph.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 69.
Saturday
Sunny, with a high near 88.
Saturday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 71.
Sunday
Sunny, with a high near 92.
Sunday Night
Mostly clear, with a low around 74.
Monday
Sunny, with a high near 93.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Jerseyville IL
 39.09°N 90.38°W (Elev. 607 ft)
3:41 am CDT Aug 5, 2026
4am CDT Aug 5, 2026-6pm CDT Aug 11, 2026
 
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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