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

44°F

7°C

Humidity 45%
Wind Speed N 3 mph
Barometer 30.03 in (1016.9 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 16 Nov 6:54 pm CST
Extended Forecast for

2 Miles WNW Elsah IL

  • Tonight

    Tonight: Mostly clear, with a low around 37. Light north wind.

    Low: 37 °F

    Mostly Clear

  • Monday

    Monday: Scattered showers, mainly after 5pm. Increasing clouds, with a high near 60. Light east wind becoming southeast 8 to 13 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 30%.

    High: 60 °F

    Sunny then
    Scattered
    Showers

  • Monday Night

    Monday Night: Showers and thunderstorms likely before 3am, then scattered showers. Mostly cloudy, with a low around 48. Southeast wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    Low: 48 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A 20 percent chance of rain. Partly sunny, with a high near 71. Southeast wind 7 to 9 mph becoming northwest in the afternoon.

    High: 71 °F

    Slight Chance
    Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 47. North wind 3 to 6 mph.

    Low: 47 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 63.

    High: 63 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Slight Chance
    Rain then
    Chance Rain

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 67. Chance of precipitation is 90%.

    High: 67 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely. Mostly cloudy, with a low around 55. Chance of precipitation is 70%.

    Low: 55 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 37. Light north wind.
Monday
Scattered showers, mainly after 5pm. Increasing clouds, with a high near 60. Light east wind becoming southeast 8 to 13 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 30%.
Monday Night
Showers and thunderstorms likely before 3am, then scattered showers. Mostly cloudy, with a low around 48. Southeast wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Tuesday
A 20 percent chance of rain. Partly sunny, with a high near 71. Southeast wind 7 to 9 mph becoming northwest in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 47. North wind 3 to 6 mph.
Wednesday
Mostly cloudy, with a high near 63.
Wednesday Night
A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 50.
Thursday
Rain and possibly a thunderstorm. High near 67. Chance of precipitation is 90%.
Thursday Night
Rain likely. Mostly cloudy, with a low around 55. Chance of precipitation is 70%.
Friday
A 50 percent chance of rain. Partly sunny, with a high near 66.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 45.
Saturday
Partly sunny, with a high near 56.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Mostly sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Elsah IL
 38.96°N 90.39°W (Elev. 407 ft)
Last Update:
6:21 pm CST Nov 16, 2025
Forecast Valid:
7pm CST Nov 16, 2025-6pm CST Nov 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