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

41°F

5°C

Humidity 51%
Wind Speed NE 15 mph
Barometer 30.36 in (1028.4 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 1 Mar 6:54 pm CST
Extended Forecast for

4 Miles SW Carrollton IL

Winter Weather Advisory until March 2, 06:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until March 2, 06:00am

    NOW until 6:00am Mon

    Winter Weather Advisory

  • Tonight

    Low: 32 °F

    Wintry Mix

  • Monday

    Monday: A 30 percent chance of rain, mainly before 8am. Cloudy, with a high near 45. East wind 6 to 10 mph.

    High: 45 °F

    Chance Rain
    then Cloudy

  • Monday Night

    Monday Night: Rain after midnight. Low around 38. Southeast wind around 7 mph. Chance of precipitation is 80%.

    Low: 38 °F

    Cloudy then
    Rain

  • Tuesday

    Tuesday: Rain and possibly a thunderstorm. High near 60. Southeast wind around 8 mph. Chance of precipitation is 90%.

    High: 60 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain, with thunderstorms also possible after 3am. Low around 50. East wind around 7 mph becoming south after midnight. Chance of precipitation is 90%.

    Low: 50 °F

    Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. High near 66. Chance of precipitation is 80%.

    High: 66 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain likely. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.

    Low: 49 °F

    Rain Likely

  • Thursday

    Thursday: Rain likely, mainly before noon. Mostly cloudy, with a high near 70. Chance of precipitation is 60%.

    High: 70 °F

    Rain Likely

Detailed Forecast

Tonight
Rain and snow before 2am, then a chance of rain, snow, and sleet between 2am and 3am. Low around 32. East wind around 10 mph. Chance of precipitation is 90%. Total nighttime snow and sleet accumulation of 1 to 2 inches possible.
Monday
A 30 percent chance of rain, mainly before 8am. Cloudy, with a high near 45. East wind 6 to 10 mph.
Monday Night
Rain after midnight. Low around 38. Southeast wind around 7 mph. Chance of precipitation is 80%.
Tuesday
Rain and possibly a thunderstorm. High near 60. Southeast wind around 8 mph. Chance of precipitation is 90%.
Tuesday Night
Rain, with thunderstorms also possible after 3am. Low around 50. East wind around 7 mph becoming south after midnight. Chance of precipitation is 90%.
Wednesday
Rain and possibly a thunderstorm. High near 66. Chance of precipitation is 80%.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.
Thursday
Rain likely, mainly before noon. Mostly cloudy, with a high near 70. Chance of precipitation is 60%.
Thursday Night
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 55.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 76. Chance of precipitation is 70%.
Friday Night
Rain likely and possibly a thunderstorm. Cloudy, with a low around 43. Chance of precipitation is 70%.
Saturday
A 50 percent chance of rain. Mostly cloudy, with a high near 60.
Saturday Night
A 30 percent chance of rain. Partly cloudy, with a low around 38.
Sunday
A 30 percent chance of rain. Sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Carrollton IL
 39.25°N 90.46°W (Elev. 600 ft)
Last Update:
4:41 pm CST Mar 1, 2026
Forecast Valid:
7pm CST Mar 1, 2026-6pm CDT Mar 8, 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