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.

Thunderstorm Light Rain Fog/Mist

39°F

4°C

Humidity 96%
Wind Speed E 5 mph
Barometer 30.09 in (1019.1 mb)
Dewpoint 38°F (3°C)
Visibility 3.00 mi
Wind Chill35°F (2°C)
Last update 3 Mar 4:54 am CST
Extended Forecast for

Rockbridge IL

  • Overnight

    Overnight: Showers and possibly a thunderstorm. Patchy fog. Low around 36. East wind around 5 mph. Chance of precipitation is 100%.

    Low: 36 °F

    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. Patchy fog before 2pm. High near 51. East wind around 6 mph becoming northeast in the afternoon. Chance of precipitation is 100%.

    High: 51 °F

    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Patchy fog after 7pm. Low around 44. Northeast wind around 8 mph. Chance of precipitation is 90%.

    Low: 44 °F

    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before noon, then showers between noon and 3pm, then showers and possibly a thunderstorm after 3pm. Patchy fog before 11am. High near 59. East wind around 7 mph becoming south in the afternoon. Chance of precipitation is 90%.

    High: 59 °F

    Showers and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 50. Southeast wind around 6 mph becoming southwest after midnight. Chance of precipitation is 90%.

    Low: 50 °F

    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before noon, then a chance of showers. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.

    High: 65 °F

    Showers
    Likely then
    Chance
    Showers

  • Thursday Night

    Thursday Night: Showers likely, mainly after midnight. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.

    Low: 52 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm before noon, then a chance of showers. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.

    High: 77 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers, then showers and possibly a thunderstorm after midnight. Low around 54. Chance of precipitation is 90%.

    Low: 54 °F

    Chance
    Showers then
    Showers

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Patchy fog. Low around 36. East wind around 5 mph. Chance of precipitation is 100%.
Tuesday
Showers and possibly a thunderstorm. Patchy fog before 2pm. High near 51. East wind around 6 mph becoming northeast in the afternoon. Chance of precipitation is 100%.
Tuesday Night
Showers and possibly a thunderstorm. Patchy fog after 7pm. Low around 44. Northeast wind around 8 mph. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm before noon, then showers between noon and 3pm, then showers and possibly a thunderstorm after 3pm. Patchy fog before 11am. High near 59. East wind around 7 mph becoming south in the afternoon. Chance of precipitation is 90%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 50. Southeast wind around 6 mph becoming southwest after midnight. Chance of precipitation is 90%.
Thursday
Showers likely and possibly a thunderstorm before noon, then a chance of showers. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Thursday Night
Showers likely, mainly after midnight. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm before noon, then a chance of showers. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.
Friday Night
A chance of showers, then showers and possibly a thunderstorm after midnight. Low around 54. Chance of precipitation is 90%.
Saturday
A 50 percent chance of showers and thunderstorms, mainly before noon. Mostly cloudy, with a high near 66.
Saturday Night
Mostly cloudy, with a low around 40.
Sunday
Sunny, with a high near 66.
Sunday Night
Mostly clear, with a low around 44.
Monday
A 20 percent chance of showers. Sunny, with a high near 71.
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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:
4:46 am CST Mar 3, 2026
Forecast Valid:
5am CST Mar 3, 2026-6pm CDT Mar 9, 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