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.

Fog/Mist

47°F

8°C

Humidity 97%
Wind Speed SE 5 mph
Barometer 30.13 in (1020.3 mb)
Dewpoint 46°F (8°C)
Visibility 1.75 mi
Wind Chill45°F (7°C)
Last update 24 Nov 2:54 am CST
Extended Forecast for

3 Miles SW Jerseyville IL

Dense Fog Advisory until November 24, 09:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until November 24, 09:00am

    NOW until 9:00am Mon

    Dense Fog Advisory

  • Overnight

    Low: 43 °F

    Areas Dense
    Fog

  • Monday

    Monday: Isolated showers before 9am, then scattered showers after 1pm. Areas of dense fog before 10am. Otherwise, cloudy, with a high near 51. Southeast wind around 9 mph. Chance of precipitation is 50%.

    High: 51 °F

    Isolated
    Showers and
    Areas Dense
    Fog then
    Scattered
    Showers

  • Monday Night

    Monday Night: Showers, mainly before 5am. Low around 50. Southeast wind 5 to 9 mph becoming light south after midnight. Chance of precipitation is 100%.

    Low: 50 °F

    Showers

  • Tuesday

    Tuesday: A 20 percent chance of showers after noon. Mostly cloudy, with a high near 58. Calm wind becoming west 5 to 9 mph in the morning.

    High: 58 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 34. West wind 8 to 18 mph, with gusts as high as 28 mph.

    Low: 34 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 43. Breezy.

    High: 43 °F

    Mostly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Thanksgiving Day

    Thanksgiving Day: Sunny, with a high near 40.

    High: 40 °F

    Sunny

Detailed Forecast

Overnight
Areas of dense fog. Otherwise, cloudy, with a low around 43. Southeast wind around 8 mph.
Monday
Isolated showers before 9am, then scattered showers after 1pm. Areas of dense fog before 10am. Otherwise, cloudy, with a high near 51. Southeast wind around 9 mph. Chance of precipitation is 50%.
Monday Night
Showers, mainly before 5am. Low around 50. Southeast wind 5 to 9 mph becoming light south after midnight. Chance of precipitation is 100%.
Tuesday
A 20 percent chance of showers after noon. Mostly cloudy, with a high near 58. Calm wind becoming west 5 to 9 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 34. West wind 8 to 18 mph, with gusts as high as 28 mph.
Wednesday
Mostly sunny, with a high near 43. Breezy.
Wednesday Night
Mostly clear, with a low around 25.
Thanksgiving Day
Sunny, with a high near 40.
Thursday Night
Mostly clear, with a low around 21.
Friday
Mostly sunny, with a high near 38.
Friday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 28.
Saturday
Rain and snow likely. Cloudy, with a high near 39. Chance of precipitation is 70%.
Saturday Night
Rain likely. Cloudy, with a low around 34. Chance of precipitation is 60%.
Sunday
A 50 percent chance of rain. Mostly cloudy, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Jerseyville IL
 39.09°N 90.38°W (Elev. 607 ft)
Last Update:
3:11 am CST Nov 24, 2025
Forecast Valid:
3am CST Nov 24, 2025-6pm CST Nov 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