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

21°C

69°F

Humidity 96%
Wind Speed N 7 km/h
Barometer 1010.9 mb (29.87 in)
Dewpoint 20°C (68°F)
Visibility 13 km
Last update 17 Jun 2:54 am CDT
Extended Forecast for

Rockbridge IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 21. Calm wind.

    Low: 21 °C

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 31. South wind 3 to 8 km/h.

    High: 31 °C

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly after 4am. Partly cloudy, with a low around 22. South wind around 11 km/h.

    Low: 22 °C

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms after 4pm. High near 27. Southwest wind 14 to 23 km/h, with gusts as high as 37 km/h. Chance of precipitation is 80%.

    High: 27 °C

    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Low around 18. West wind 10 to 16 km/h. Chance of precipitation is 80%.

    Low: 18 °C

    T-storms then
    Chance
    Showers

  • Juneteenth

    Juneteenth: Sunny, with a high near 28.

    High: 28 °C

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 18.

    Low: 18 °C

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 32.

    High: 32 °C

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 23.

    Low: 23 °C

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 21. Calm wind.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 31. South wind 3 to 8 km/h.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly after 4am. Partly cloudy, with a low around 22. South wind around 11 km/h.
Wednesday
Showers and thunderstorms likely before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms after 4pm. High near 27. Southwest wind 14 to 23 km/h, with gusts as high as 37 km/h. Chance of precipitation is 80%.
Wednesday Night
Showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Low around 18. West wind 10 to 16 km/h. Chance of precipitation is 80%.
Juneteenth
Sunny, with a high near 28.
Thursday Night
Mostly clear, with a low around 18.
Friday
Sunny, with a high near 32.
Friday Night
Mostly clear, with a low around 23.
Saturday
Sunny, with a high near 34.
Saturday Night
Mostly clear, with a low around 24.
Sunday
Sunny, with a high near 34.
Sunday Night
Mostly clear, with a low around 23.
Monday
Sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rockbridge IL
 39.26°N 90.2°W (Elev. 509 m)
Last Update:
1:36 am CDT Jun 17, 2025
Forecast Valid:
3am CDT Jun 17, 2025-6pm CDT Jun 23, 2025
 
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