Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

17°F

-8°C

Humidity 88%
Wind Speed E 3 mph
Barometer 30.07 in (1018.9 mb)
Dewpoint 14°F (-10°C)
Visibility 8.00 mi
Last update 2 Dec 11:54 pm CST
Extended Forecast for

4 Miles W Jerseyville IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 18. South wind around 6 mph.

    Low: 18 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of snow, mainly after 4pm.  Mostly cloudy, with a high near 37. South wind 6 to 8 mph becoming northwest in the afternoon.

    High: 37 °F

    Mostly Cloudy
    then Chance
    Snow

  • Wednesday Night

    Wednesday Night: A 40 percent chance of snow, mainly before 11pm.  Cloudy, then gradually becoming partly cloudy, with a low around 10. North wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 10 °F

    Chance Snow
    then Mostly
    Cloudy

  • Thursday

    Thursday: Sunny and cold, with a high near 20. North wind 5 to 8 mph becoming calm  in the afternoon.

    High: 20 °F

    Cold

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 8. Calm wind becoming south around 5 mph after midnight.

    Low: 8 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Friday Night

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

    Low: 20 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of snow after midnight.  Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy
    then Slight
    Chance Snow

Detailed Forecast

Overnight
Mostly cloudy, with a low around 18. South wind around 6 mph.
Wednesday
A 50 percent chance of snow, mainly after 4pm. Mostly cloudy, with a high near 37. South wind 6 to 8 mph becoming northwest in the afternoon.
Wednesday Night
A 40 percent chance of snow, mainly before 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 10. North wind 8 to 11 mph, with gusts as high as 21 mph.
Thursday
Sunny and cold, with a high near 20. North wind 5 to 8 mph becoming calm in the afternoon.
Thursday Night
Partly cloudy, with a low around 8. Calm wind becoming south around 5 mph after midnight.
Friday
Mostly sunny, with a high near 33.
Friday Night
Partly cloudy, with a low around 20.
Saturday
Partly sunny, with a high near 34.
Saturday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 22.
Sunday
A 20 percent chance of snow. Mostly cloudy, with a high near 31.
Sunday Night
Mostly cloudy, with a low around 17.
Monday
Partly sunny, with a high near 32.
Monday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 24.
Tuesday
Partly sunny, with a high near 38.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Jerseyville IL
 39.11°N 90.41°W (Elev. 617 ft)
9:56 pm CST Dec 2, 2025
12am CST Dec 3, 2025-6pm CST Dec 9, 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