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.

Freezing Fog

28°F

-2°C

Humidity 96%
Wind Speed Calm
Barometer 29.95 in (1014.1 mb)
Dewpoint 27°F (-3°C)
Visibility 0.25 mi
Last update 27 Feb 5:54 am CST
Extended Forecast for

Rockbridge IL

Red Flag Warning February 27, 12:00pm until February 27, 06:00pm
Click here for hazard details and duration
Red Flag Warning

  • Today

    Today: Sunny, with a high near 71. Breezy, with a light and variable wind becoming southwest 15 to 20 mph in the morning. Winds could gust as high as 29 mph.

    High: 71 °F

    Sunny then
    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 34. West wind 6 to 8 mph becoming northeast after midnight.

    Low: 34 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of rain after noon. Mostly sunny, with a high near 60. Northeast wind 6 to 10 mph becoming southeast in the afternoon.

    High: 60 °F

    Mostly Sunny
    then Chance
    Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 25. North wind 10 to 13 mph, with gusts as high as 21 mph.

    Low: 25 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of rain and snow after noon. Mostly cloudy, with a high near 43. East wind 10 to 13 mph. Chance of precipitation is 20%.

    High: 43 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Rain and snow, becoming all snow after 3am. Low around 28. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 28 °F

    Rain/Snow

  • Monday

    Monday: A chance of rain and snow before noon, then a slight chance of rain. Mostly cloudy, with a high near 41. Chance of precipitation is 30%.

    High: 41 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain likely, mainly after midnight. Cloudy, with a low around 31. Chance of precipitation is 60%.

    Low: 31 °F

    Rain Likely

  • Tuesday

    Tuesday: Rain. High near 49. Chance of precipitation is 80%.

    High: 49 °F

    Rain

Detailed Forecast

Today
Sunny, with a high near 71. Breezy, with a light and variable wind becoming southwest 15 to 20 mph in the morning. Winds could gust as high as 29 mph.
Tonight
Mostly clear, with a low around 34. West wind 6 to 8 mph becoming northeast after midnight.
Saturday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 60. Northeast wind 6 to 10 mph becoming southeast in the afternoon.
Saturday Night
Partly cloudy, with a low around 25. North wind 10 to 13 mph, with gusts as high as 21 mph.
Sunday
A slight chance of rain and snow after noon. Mostly cloudy, with a high near 43. East wind 10 to 13 mph. Chance of precipitation is 20%.
Sunday Night
Rain and snow, becoming all snow after 3am. Low around 28. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Monday
A chance of rain and snow before noon, then a slight chance of rain. Mostly cloudy, with a high near 41. Chance of precipitation is 30%.
Monday Night
Rain likely, mainly after midnight. Cloudy, with a low around 31. Chance of precipitation is 60%.
Tuesday
Rain. High near 49. Chance of precipitation is 80%.
Tuesday Night
Rain likely, with thunderstorms also possible after midnight. Cloudy, with a low around 37. Chance of precipitation is 70%.
Wednesday
Rain likely. Cloudy, with a high near 58. Chance of precipitation is 60%.
Wednesday Night
Rain likely. Cloudy, with a low around 47. Chance of precipitation is 70%.
Thursday
Rain likely. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rockbridge IL
 39.26°N 90.2°W (Elev. 509 ft)
Last Update:
5:51 am CST Feb 27, 2026
Forecast Valid:
6am CST Feb 27, 2026-6pm CST Mar 5, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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