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

20°F

-7°C

Humidity 85%
Wind Speed Calm
Barometer 30.32 in (1027.3 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Last update 12 Jan 5:54 am CST
Extended Forecast for

2 Miles N Rockbridge IL

  • Today

    Today: Sunny, with a high near 50. Southwest wind 8 to 10 mph.

    High: 50 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 33. Southwest wind 7 to 9 mph.

    Low: 33 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 56. West wind 9 to 16 mph, with gusts as high as 26 mph.

    High: 56 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 35. West wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 35 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain and snow showers between noon and 3pm, then a slight chance of snow showers after 3pm. Mostly cloudy, with a temperature falling to around 31 by 5pm. Breezy, with a northwest wind 13 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.

    High: 41 °F⇓

    Breezy.
    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 15.

    Low: 15 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 29.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 24.

    Low: 24 °F

    Slight Chance
    Snow Showers
    then Mostly
    Cloudy

  • Friday

    Friday: A 30 percent chance of snow showers after noon. Mostly cloudy, with a high near 40.

    High: 40 °F

    Partly Sunny
    then Chance
    Snow Showers

Detailed Forecast

Today
Sunny, with a high near 50. Southwest wind 8 to 10 mph.
Tonight
Mostly clear, with a low around 33. Southwest wind 7 to 9 mph.
Tuesday
Increasing clouds, with a high near 56. West wind 9 to 16 mph, with gusts as high as 26 mph.
Tuesday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 35. West wind 8 to 11 mph, with gusts as high as 20 mph.
Wednesday
A slight chance of rain and snow showers between noon and 3pm, then a slight chance of snow showers after 3pm. Mostly cloudy, with a temperature falling to around 31 by 5pm. Breezy, with a northwest wind 13 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 15.
Thursday
Mostly sunny, with a high near 29.
Thursday Night
A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 24.
Friday
A 30 percent chance of snow showers after noon. Mostly cloudy, with a high near 40.
Friday Night
Mostly cloudy, with a low around 16.
Saturday
Mostly cloudy, with a high near 26.
Saturday Night
Partly cloudy, with a low around 7.
Sunday
Mostly sunny, with a high near 25.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Rockbridge IL
 39.31°N 90.2°W (Elev. 535 ft)
Last Update:
5:01 am CST Jan 12, 2026
Forecast Valid:
6am CST Jan 12, 2026-6pm CST Jan 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation