National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

25°F

-4°C

Humidity 63%
Wind Speed W 17 G 23 mph
Barometer 30.36 in (1028.5 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill12°F (-11°C)
Last update 22 Feb 2:54 am CST
Extended Forecast for

Rockbridge IL

  • Overnight

    Overnight: Partly cloudy, with a low around 17. Northwest wind 15 to 17 mph, with gusts as high as 25 mph.

    Low: 17 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 29. Blustery, with a northwest wind 17 to 22 mph, with gusts as high as 34 mph.

    High: 29 °F

    Mostly Sunny
    and Blustery

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 12. Northwest wind 14 to 17 mph, with gusts as high as 28 mph.

    Low: 12 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 31. Northwest wind 8 to 16 mph, with gusts as high as 26 mph.

    High: 31 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 17. Calm wind becoming south 5 to 9 mph after midnight.

    Low: 17 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 52.

    High: 52 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 33. Chance of precipitation is 60%.

    Low: 33 °F

    Rain Likely

Detailed Forecast

Overnight
Partly cloudy, with a low around 17. Northwest wind 15 to 17 mph, with gusts as high as 25 mph.
Sunday
Mostly sunny, with a high near 29. Blustery, with a northwest wind 17 to 22 mph, with gusts as high as 34 mph.
Sunday Night
Partly cloudy, with a low around 12. Northwest wind 14 to 17 mph, with gusts as high as 28 mph.
Monday
Sunny, with a high near 31. Northwest wind 8 to 16 mph, with gusts as high as 26 mph.
Monday Night
Partly cloudy, with a low around 17. Calm wind becoming south 5 to 9 mph after midnight.
Tuesday
Mostly cloudy, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Mostly sunny, with a high near 53.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 33. Chance of precipitation is 60%.
Thursday
A 30 percent chance of rain before noon. Mostly sunny, with a high near 49.
Thursday Night
Mostly clear, with a low around 27.
Friday
Sunny, with a high near 60.
Friday Night
Mostly clear, with a low around 37.
Saturday
A 20 percent chance of rain. Mostly sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rockbridge IL
 39.26°N 90.2°W (Elev. 509 ft)
Last Update:
1:41 am CST Feb 22, 2026
Forecast Valid:
3am CST Feb 22, 2026-6pm CST Feb 28, 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