Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Overcast

28°F

-2°C

Humidity 66%
Wind Speed N 8 mph
Barometer 30.31 in (1026.7 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 4 Feb 12:54 am CST
Extended Forecast for

Jerseyville IL

  • Overnight

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

    Low: 18 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 30. North wind around 7 mph.

    High: 30 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 15. North wind around 5 mph becoming calm.

    Low: 15 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 39. South wind 5 to 10 mph.

    High: 39 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 29. South wind 7 to 10 mph becoming west after midnight.

    Low: 29 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 18. North wind around 6 mph.
Wednesday
Partly sunny, with a high near 30. North wind around 7 mph.
Wednesday Night
Mostly clear, with a low around 15. North wind around 5 mph becoming calm.
Thursday
Partly sunny, with a high near 39. South wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 29. South wind 7 to 10 mph becoming west after midnight.
Friday
Mostly sunny, with a high near 47.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Mostly sunny, with a high near 39.
Saturday Night
Partly cloudy, with a low around 28.
Sunday
Mostly sunny, with a high near 49.
Sunday Night
Mostly clear, with a low around 27.
Monday
Mostly sunny, with a high near 49.
Monday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 36.
Tuesday
A 20 percent chance of rain. Partly sunny, with a high near 56.
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ABOUT THIS FORECAST

 
Point Forecast:
Jerseyville IL
 39.11°N 90.32°W (Elev. 630 ft)
12:26 am CST Feb 4, 2026
1am CST Feb 4, 2026-6pm CST Feb 10, 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