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

48°F

9°C

Humidity 41%
Wind Speed S 13 mph
Barometer 29.95 in (1014.1 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 12 Mar 9:54 pm CDT
Extended Forecast for

Jerseyville IL

Wind Advisory until March 13, 11:00am
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory until March 13, 11:00am

    NOW until 11:00am Fri

    Wind Advisory

  • Tonight

    Low: 43 °F

    Mostly Cloudy
    and Breezy

  • Friday

    Friday: Mostly sunny, with a high near 57. Breezy, with a west wind 15 to 21 mph, with gusts as high as 32 mph.

    High: 57 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 35. Northwest wind 5 to 7 mph becoming east after midnight.

    Low: 35 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 63. Southeast wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 63 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 51. Southeast wind 11 to 15 mph, with gusts as high as 24 mph.

    Low: 51 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday

    Sunday: Rain and possibly a thunderstorm. High near 66. Breezy. Chance of precipitation is 90%.

    High: 66 °F

    Breezy. Rain
    Likely then
    Rain

  • Sunday Night

    Sunday Night: Rain and snow before 1am, then a chance of snow. Some thunder is also possible. Low around 19. Windy. Chance of precipitation is 80%.

    Low: 19 °F

    Rain/Snow and
    Windy

  • Monday

    Monday: A 20 percent chance of snow before 1pm. Partly sunny, with a high near 26. Blustery.

    High: 26 °F

    Slight Chance
    Snow and
    Blustery

Detailed Forecast

Tonight
Mostly cloudy, with a low around 43. Breezy, with a south wind 14 to 23 mph, with gusts as high as 37 mph.
Friday
Mostly sunny, with a high near 57. Breezy, with a west wind 15 to 21 mph, with gusts as high as 32 mph.
Friday Night
Partly cloudy, with a low around 35. Northwest wind 5 to 7 mph becoming east after midnight.
Saturday
Partly sunny, with a high near 63. Southeast wind 9 to 14 mph, with gusts as high as 21 mph.
Saturday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 51. Southeast wind 11 to 15 mph, with gusts as high as 24 mph.
Sunday
Rain and possibly a thunderstorm. High near 66. Breezy. Chance of precipitation is 90%.
Sunday Night
Rain and snow before 1am, then a chance of snow. Some thunder is also possible. Low around 19. Windy. Chance of precipitation is 80%.
Monday
A 20 percent chance of snow before 1pm. Partly sunny, with a high near 26. Blustery.
Monday Night
Mostly clear, with a low around 11.
Tuesday
Mostly sunny, with a high near 32.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 24. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 53.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
Sunny, with a high near 65.
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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:
10:36 pm CDT Mar 12, 2026
Forecast Valid:
10pm CDT Mar 12, 2026-6pm CDT Mar 19, 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