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.

Fair

38°F

3°C

Humidity 57%
Wind Speed NE 13 mph
Barometer 30.41 in (1029.9 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 1 Mar 10:54 am CST
Extended Forecast for

Rockbridge IL

Winter Weather Advisory March 1, 06:00pm until March 2, 06:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Today

    Today: Increasing clouds, with a high near 44. Northeast wind 11 to 13 mph.

    High: 44 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Rain, snow, and sleet before 3am, then a slight chance of rain between 3am and 4am. Low around 31. East wind 8 to 10 mph. Chance of precipitation is 90%. New snow and sleet accumulation of 1 to 2 inches possible.

    Low: 31 °F

    Wintry Mix

  • Monday

    Monday: A 30 percent chance of rain, mainly before 8am. Cloudy, with a high near 46. East wind 7 to 10 mph.

    High: 46 °F

    Chance Rain
    then Cloudy

  • Monday Night

    Monday Night: Rain between midnight and 3am, then showers after 3am. Low around 37. Southeast wind 5 to 7 mph. Chance of precipitation is 80%.

    Low: 37 °F

    Cloudy then
    Rain

  • Tuesday

    Tuesday: Showers. High near 59. South wind 7 to 10 mph. Chance of precipitation is 90%.

    High: 59 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers, with thunderstorms also possible after midnight. Low around 51. Chance of precipitation is 80%.

    Low: 51 °F

    Showers

  • Wednesday

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

    High: 66 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely. Mostly cloudy, with a low around 48. Chance of precipitation is 70%.

    Low: 48 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers likely, mainly before noon. Partly sunny, with a high near 66. Chance of precipitation is 60%.

    High: 66 °F

    Showers
    Likely

Detailed Forecast

Today
Increasing clouds, with a high near 44. Northeast wind 11 to 13 mph.
Tonight
Rain, snow, and sleet before 3am, then a slight chance of rain between 3am and 4am. Low around 31. East wind 8 to 10 mph. Chance of precipitation is 90%. New 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 46. East wind 7 to 10 mph.
Monday Night
Rain between midnight and 3am, then showers after 3am. Low around 37. Southeast wind 5 to 7 mph. Chance of precipitation is 80%.
Tuesday
Showers. High near 59. South wind 7 to 10 mph. Chance of precipitation is 90%.
Tuesday Night
Showers, with thunderstorms also possible after midnight. Low around 51. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. High near 66. Chance of precipitation is 80%.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 48. Chance of precipitation is 70%.
Thursday
Showers likely, mainly before noon. Partly sunny, with a high near 66. Chance of precipitation is 60%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.
Saturday
Showers likely. Cloudy, with a high near 61. Chance of precipitation is 60%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rockbridge IL
 39.26°N 90.2°W (Elev. 509 ft)
Last Update:
10:56 am CST Mar 1, 2026
Forecast Valid:
11am CST Mar 1, 2026-6pm CST Mar 7, 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