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

69°F

21°C

Humidity 49%
Wind Speed S 14 mph
Barometer 29.99 in (1015.2 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 30 Mar 8:54 am CDT
Extended Forecast for

Rockbridge IL

  • Today

    Today: Mostly sunny, with a high near 81. Breezy, with a southwest wind 15 to 22 mph, with gusts as high as 31 mph.

    High: 81 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 62. South wind 11 to 15 mph, with gusts as high as 25 mph.

    Low: 62 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of rain and thunderstorms. Partly sunny, with a high near 83. Breezy, with a southwest wind 15 to 22 mph, with gusts as high as 38 mph.

    High: 83 °F

    Breezy.
    Chance Rain
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 52. Southwest wind around 11 mph becoming north after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%.

    Low: 52 °F

    Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. High near 69. East wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    High: 69 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 57. Chance of precipitation is 80%.

    Low: 57 °F

    Rain

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 73. Breezy. Chance of precipitation is 90%.

    High: 73 °F

    Rain and
    Breezy

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm before 1am, then a chance of rain. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.

    Low: 53 °F

    Rain Likely

  • Friday

    Friday: A chance of rain and thunderstorms. Mostly cloudy, with a high near 76. Chance of precipitation is 40%.

    High: 76 °F

    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 81. Breezy, with a southwest wind 15 to 22 mph, with gusts as high as 31 mph.
Tonight
Mostly cloudy, with a low around 62. South wind 11 to 15 mph, with gusts as high as 25 mph.
Tuesday
A 50 percent chance of rain and thunderstorms. Partly sunny, with a high near 83. Breezy, with a southwest wind 15 to 22 mph, with gusts as high as 38 mph.
Tuesday Night
Rain and possibly a thunderstorm. Low around 52. Southwest wind around 11 mph becoming north after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%.
Wednesday
Rain and possibly a thunderstorm. High near 69. East wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Wednesday Night
Rain and possibly a thunderstorm. Low around 57. Chance of precipitation is 80%.
Thursday
Rain and possibly a thunderstorm. High near 73. Breezy. Chance of precipitation is 90%.
Thursday Night
Rain likely and possibly a thunderstorm before 1am, then a chance of rain. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.
Friday
A chance of rain and thunderstorms. Mostly cloudy, with a high near 76. Chance of precipitation is 40%.
Friday Night
Rain likely, mainly after 1am. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.
Saturday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 67. Breezy. Chance of precipitation is 60%.
Saturday Night
A 40 percent chance of rain. Partly cloudy, with a low around 37.
Sunday
A 20 percent chance of rain. Mostly sunny, with a high near 56.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Rockbridge IL
 39.26°N 90.2°W (Elev. 509 ft)
Last Update:
8:52 am CDT Mar 30, 2026
Forecast Valid:
9am CDT Mar 30, 2026-6pm CDT Apr 5, 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