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.

Overcast

52°F

11°C

Humidity 86%
Wind Speed E 9 mph
Barometer 30.17 in (1021.7 mb)
Dewpoint 48°F (9°C)
Visibility 7.00 mi
Wind Chill49°F (9°C)
Last update 24 Dec 10:54 am CST
Extended Forecast for

3 Miles WSW Jerseyville IL

  • Today

    Today: Mostly cloudy, with a high near 62. Southeast wind 7 to 10 mph.

    High: 62 °F

    Mostly Cloudy

  • Tonight

    Tonight: Widespread dense fog, mainly after 5am. Otherwise, mostly cloudy, with a low around 50. Southeast wind 5 to 7 mph becoming light and variable after midnight.

    Low: 50 °F

    Dense Fog

  • Christmas Day

    Christmas Day: Widespread dense fog, mainly before 7am. Otherwise, mostly cloudy, with a high near 60. Light and variable wind becoming east around 6 mph in the morning.

    High: 60 °F

    Dense Fog
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 54. East wind 7 to 9 mph becoming south after midnight.

    Low: 54 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 67. South wind 6 to 11 mph becoming northwest in the afternoon.

    High: 67 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of rain before noon, then a slight chance of rain and snow. Mostly cloudy, with a high near 48. Breezy. Chance of precipitation is 20%.

    High: 48 °F

    Breezy.
    Slight Chance
    Rain then
    Slight Chance
    Rain/Snow

Detailed Forecast

Today
Mostly cloudy, with a high near 62. Southeast wind 7 to 10 mph.
Tonight
Widespread dense fog, mainly after 5am. Otherwise, mostly cloudy, with a low around 50. Southeast wind 5 to 7 mph becoming light and variable after midnight.
Christmas Day
Widespread dense fog, mainly before 7am. Otherwise, mostly cloudy, with a high near 60. Light and variable wind becoming east around 6 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 54. East wind 7 to 9 mph becoming south after midnight.
Friday
Mostly sunny, with a high near 67. South wind 6 to 11 mph becoming northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 46.
Saturday
Partly sunny, with a high near 67.
Saturday Night
Mostly cloudy, with a low around 41.
Sunday
A slight chance of rain before noon, then a slight chance of rain and snow. Mostly cloudy, with a high near 48. Breezy. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 16.
Monday
Mostly sunny, with a high near 26.
Monday Night
Mostly clear, with a low around 15.
Tuesday
Partly sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Jerseyville IL
 39.11°N 90.38°W (Elev. 600 ft)
Last Update:
11:01 am CST Dec 24, 2025
Forecast Valid:
11am CST Dec 24, 2025-6pm CST Dec 30, 2025
 
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