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.

Partly Cloudy

14°F

-10°C

Humidity 67%
Wind Speed Calm
Barometer 30.37 in (1029.3 mb)
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Last update 1 Feb 10:54 am CST
Extended Forecast for

4 Miles W Jerseyville IL

  • Today

    Today: A chance of flurries before noon, then a chance of snow, mainly after 2pm. Cloudy, with a high near 27. South wind 8 to 11 mph. Chance of precipitation is 40%.

    High: 27 °F

    Chance Snow

  • Tonight

    Tonight: A 40 percent chance of snow, mainly before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 18. South wind 5 to 7 mph becoming west after midnight.

    Low: 18 °F

    Chance Snow
    then Partly
    Cloudy

  • Monday

    Monday: Partly sunny, with a high near 36. Northwest wind 5 to 7 mph becoming calm in the afternoon.

    High: 36 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 23. Calm wind becoming northeast around 6 mph after midnight.

    Low: 23 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 32. North wind 6 to 8 mph.

    High: 32 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 29.

    High: 29 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 13.

    Low: 13 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

Detailed Forecast

Today
A chance of flurries before noon, then a chance of snow, mainly after 2pm. Cloudy, with a high near 27. South wind 8 to 11 mph. Chance of precipitation is 40%.
Tonight
A 40 percent chance of snow, mainly before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 18. South wind 5 to 7 mph becoming west after midnight.
Monday
Partly sunny, with a high near 36. Northwest wind 5 to 7 mph becoming calm in the afternoon.
Monday Night
Mostly cloudy, with a low around 23. Calm wind becoming northeast around 6 mph after midnight.
Tuesday
Mostly cloudy, with a high near 32. North wind 6 to 8 mph.
Tuesday Night
Mostly cloudy, with a low around 15.
Wednesday
Mostly sunny, with a high near 29.
Wednesday Night
Partly cloudy, with a low around 13.
Thursday
Partly sunny, with a high near 39.
Thursday Night
Partly cloudy, with a low around 30.
Friday
Mostly sunny, with a high near 44.
Friday Night
Partly cloudy, with a low around 19.
Saturday
Mostly sunny, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Jerseyville IL
 39.11°N 90.41°W (Elev. 617 ft)
Last Update:
10:12 am CST Feb 1, 2026
Forecast Valid:
11am CST Feb 1, 2026-6pm CST Feb 7, 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