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

50°F

10°C

Humidity 59%
Wind Speed W 6 mph
Barometer 30.30 in (1026.1 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 5 Apr 8:54 pm CDT
Extended Forecast for

3 Miles E Elsah IL

  • Tonight

    Tonight: Clear, with a low around 40. West wind around 6 mph.

    Low: 40 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 60. Northwest wind 7 to 11 mph.

    High: 60 °F

    Sunny

  • Monday Night

    Monday Night: A chance of rain showers after 1am, mixing with snow after 4am. Increasing clouds, with a low around 37. North wind 8 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 37 °F

    Partly Cloudy
    then Chance
    Rain/Snow

  • Tuesday

    Tuesday: A 30 percent chance of snow showers before 7am. Mostly cloudy, with a high near 53. East wind 8 to 10 mph.

    High: 53 °F

    Chance Snow
    Showers then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40. East wind around 9 mph.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 73. Chance of precipitation is 30%.

    High: 73 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 40. West wind around 6 mph.
Monday
Sunny, with a high near 60. Northwest wind 7 to 11 mph.
Monday Night
A chance of rain showers after 1am, mixing with snow after 4am. Increasing clouds, with a low around 37. North wind 8 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Tuesday
A 30 percent chance of snow showers before 7am. Mostly cloudy, with a high near 53. East wind 8 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 40. East wind around 9 mph.
Wednesday
Mostly sunny, with a high near 73.
Wednesday Night
Partly cloudy, with a low around 55.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 73. Chance of precipitation is 30%.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
Friday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 74.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Sunday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Elsah IL
 38.95°N 90.3°W (Elev. 449 ft)
Last Update:
5:36 pm CDT Apr 5, 2026
Forecast Valid:
9pm CDT Apr 5, 2026-6pm CDT Apr 12, 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