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

73°F

23°C

Humidity 84%
Wind Speed E 3 mph
Barometer 30.01 in (1015.6 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 15 Jun 10:54 pm CDT
Extended Forecast for

4 Miles ENE Jerseyville IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 68. Light east wind.

    Low: 68 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 83. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 83 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 67. Southeast wind 3 to 6 mph.

    Low: 67 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 90. Calm wind becoming southwest 5 to 7 mph in the morning.

    High: 90 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 71. South wind 7 to 9 mph.

    Low: 71 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 85. Chance of precipitation is 60%.

    High: 85 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 68. Light east wind.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 83. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 67. Southeast wind 3 to 6 mph.
Tuesday
Mostly sunny, with a high near 90. Calm wind becoming southwest 5 to 7 mph in the morning.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 71. South wind 7 to 9 mph.
Wednesday
Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 85. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 68.
Juneteenth
Mostly sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 73.
Saturday
Sunny, with a high near 93.
Saturday Night
Mostly clear, with a low around 74.
Sunday
Sunny, with a high near 92.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE Jerseyville IL
 39.13°N 90.27°W (Elev. 558 ft)
Last Update:
10:51 pm CDT Jun 15, 2025
Forecast Valid:
11pm CDT Jun 15, 2025-6pm CDT Jun 22, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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