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

69°F

21°C

Humidity 90%
Wind Speed E 3 mph
Barometer 29.94 in (1013.5 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 26 Jun 2:54 am CDT
Extended Forecast for

Rockbridge IL

Flood Watch June 26, 04:03am until June 26, 07:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 26, 04:03am until June 26, 07:00pm

    NOW until 7:00pm Fri

    Flood Watch

  • Overnight

    Low: 67 °F

    Chance
    T-storms

  • Friday

    Friday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 77. Southeast wind around 8 mph becoming north in the afternoon. Chance of precipitation is 100%.

    High: 77 °F

    Heavy Rain

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Mostly cloudy, with a low around 62. Northeast wind 3 to 8 mph. Chance of precipitation is 40%.

    Low: 62 °F

    Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 82. Light and variable wind.

    High: 82 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Southeast wind 5 to 7 mph.

    Low: 68 °F

    Chance
    T-storms

  • Sunday

    Sunday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

Detailed Forecast

Overnight
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67. East wind around 5 mph.
Friday
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 77. Southeast wind around 8 mph becoming north in the afternoon. Chance of precipitation is 100%.
Friday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Mostly cloudy, with a low around 62. Northeast wind 3 to 8 mph. Chance of precipitation is 40%.
Saturday
Partly sunny, with a high near 82. Light and variable wind.
Saturday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Southeast wind 5 to 7 mph.
Sunday
Sunny, with a high near 93.
Sunday Night
Mostly clear, with a low around 73.
Monday
Sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 74.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Clear, with a low around 73.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
Sunny, with a high near 96.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rockbridge IL
 39.28°N 90.2°W (Elev. 531 ft)
Last Update:
3:36 am CDT Jun 26, 2026
Forecast Valid:
4am CDT Jun 26, 2026-6pm CDT Jul 2, 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