Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

11°F

-12°C

Humidity 81%
Wind Speed Calm
Barometer 30.17 in (1022.4 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Last update 5 Dec 1:54 am CST
Extended Forecast for

Jerseyville IL

  • Overnight

    Overnight: Mostly clear, with a low around 3. Calm wind becoming south around 5 mph.

    Low: 3 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, then gradually becoming sunny, with a high near 39. South wind 5 to 9 mph.

    High: 39 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 27. South wind around 7 mph becoming west after midnight.

    Low: 27 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 35. Northwest wind around 6 mph becoming light and variable.

    High: 35 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 50 percent chance of snow after midnight.  Mostly cloudy, with a low around 27. Southeast wind 6 to 8 mph.

    Low: 27 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: A chance of rain and snow before 9am, then a chance of snow between 9am and noon.  Mostly cloudy, with a high near 35. Chance of precipitation is 30%.

    High: 35 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 10.

    Low: 10 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 20.

    Low: 20 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 3. Calm wind becoming south around 5 mph.
Friday
Partly sunny, then gradually becoming sunny, with a high near 39. South wind 5 to 9 mph.
Friday Night
Mostly cloudy, with a low around 27. South wind around 7 mph becoming west after midnight.
Saturday
Mostly cloudy, with a high near 35. Northwest wind around 6 mph becoming light and variable.
Saturday Night
A 50 percent chance of snow after midnight. Mostly cloudy, with a low around 27. Southeast wind 6 to 8 mph.
Sunday
A chance of rain and snow before 9am, then a chance of snow between 9am and noon. Mostly cloudy, with a high near 35. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 10.
Monday
Mostly sunny, with a high near 28.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Mostly sunny, with a high near 42.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 42.
Wednesday Night
Mostly cloudy, with a low around 19.
Thursday
Mostly cloudy, with a high near 29.
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ABOUT THIS FORECAST

 
Point Forecast:
Jerseyville IL
 39.11°N 90.32°W (Elev. 630 ft)
12:26 am CST Dec 5, 2025
2am CST Dec 5, 2025-6pm CST Dec 11, 2025
 
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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