Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

15°F

-9°C

Humidity 61%
Wind Speed NW 12 mph
Barometer 30.24 in (1024.6 mb)
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Wind Chill1°F (-17°C)
Last update 17 Mar 6:54 am CDT
Extended Forecast for

3 Miles SW Jerseyville IL

  • Today

    Today: Increasing clouds, with a high near 32. Northwest wind 6 to 11 mph becoming south in the afternoon.

    High: 32 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A chance of snow before 3am, then a chance of rain.  Cloudy, with a low around 28. Southeast wind 7 to 14 mph, with gusts as high as 23 mph.  Chance of precipitation is 50%.

    Low: 28 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 62. South wind 9 to 11 mph becoming west in the afternoon. Winds could gust as high as 20 mph.

    High: 62 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 41. West wind around 5 mph becoming calm.

    Low: 41 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 72. South wind 6 to 8 mph becoming west in the afternoon.

    High: 72 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 32. Northwest wind 6 to 11 mph becoming south in the afternoon.
Tonight
A chance of snow before 3am, then a chance of rain. Cloudy, with a low around 28. Southeast wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 62. South wind 9 to 11 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around 41. West wind around 5 mph becoming calm.
Thursday
Mostly sunny, with a high near 72. South wind 6 to 8 mph becoming west in the afternoon.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 48.
Saturday
Sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 51.
Sunday
Mostly sunny, with a high near 73.
Sunday Night
Partly cloudy, with a low around 39.
Monday
Partly sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Jerseyville IL
 39.09°N 90.38°W (Elev. 607 ft)
3:31 am CDT Mar 17, 2026
6am CDT Mar 17, 2026-6pm CDT Mar 23, 2026
 
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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