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

68°F

20°C

Humidity 68%
Wind Speed E 9 mph
Barometer 29.92 in (1013.0 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 11 Oct 7:54 pm CDT
Extended Forecast for

Elsah IL

  • Tonight

    Tonight: Partly cloudy, with a low around 63. Southeast wind 5 to 7 mph becoming southwest after midnight.

    Low: 63 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Sunny, with a high near 94. Southwest wind 7 to 14 mph, with gusts as high as 21 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 70. Southwest wind 8 to 10 mph.

    Low: 70 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92. Southwest wind 7 to 10 mph.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70. South wind around 6 mph.

    Low: 70 °F

    Partly Cloudy
    then Chance
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 90%.

    High: 82 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 63. Chance of precipitation is 60%.

    Low: 63 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 90%.

    High: 77 °F

    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 63. Southeast wind 5 to 7 mph becoming southwest after midnight.
Columbus Day
Sunny, with a high near 94. Southwest wind 7 to 14 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 70. Southwest wind 8 to 10 mph.
Tuesday
Sunny, with a high near 92. Southwest wind 7 to 10 mph.
Tuesday Night
A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70. South wind around 6 mph.
Wednesday
Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 90%.
Wednesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 63. Chance of precipitation is 60%.
Thursday
Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 90%.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 54.
Friday
Partly sunny, with a high near 66. Breezy.
Friday Night
Partly cloudy, with a low around 40.
Saturday
Sunny, with a high near 61.
Saturday Night
Clear, with a low around 38.
Sunday
Sunny, with a high near 68.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Elsah IL
 38.95°N 90.33°W (Elev. 554 ft)
Last Update:
5:41 pm CDT Oct 11, 2026
Forecast Valid:
8pm CDT Oct 11, 2026-6pm CDT Oct 18, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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