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

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

61°F

16°C

Humidity 35%
Wind Speed W 15 mph
Barometer 30.28 in (1025.1 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 6 Apr 2:54 pm CDT
Extended Forecast for

3 Miles SSW Dow IL

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 4am. Increasing clouds, with a low around 36. North wind 8 to 11 mph.

    Low: 36 °F

    Partly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A chance of rain and snow showers before 8am, then a chance of rain showers between 8am and 11am. Cloudy, then gradually becoming mostly sunny, with a high near 52. East wind around 11 mph. Chance of precipitation is 30%.

    High: 52 °F

    Chance
    Rain/Snow
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 39. East wind around 10 mph.

    Low: 39 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72. South wind 11 to 16 mph, with gusts as high as 26 mph.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 52. South wind 10 to 14 mph, with gusts as high as 21 mph.

    Low: 52 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    Showers

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 74.

    High: 74 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A 30 percent chance of showers, mainly after 4am. Increasing clouds, with a low around 36. North wind 8 to 11 mph.
Tuesday
A chance of rain and snow showers before 8am, then a chance of rain showers between 8am and 11am. Cloudy, then gradually becoming mostly sunny, with a high near 52. East wind around 11 mph. Chance of precipitation is 30%.
Tuesday Night
Partly cloudy, with a low around 39. East wind around 10 mph.
Wednesday
Mostly sunny, with a high near 72. South wind 11 to 16 mph, with gusts as high as 26 mph.
Wednesday Night
Partly cloudy, with a low around 52. South wind 10 to 14 mph, with gusts as high as 21 mph.
Thursday
Mostly sunny, with a high near 75.
Thursday Night
A 40 percent chance of showers. 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. Partly sunny, with a high near 78.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Sunday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 81. Chance of precipitation is 60%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Dow IL
 39°N 90.33°W (Elev. 597 ft)
Last Update:
1:26 pm CDT Apr 6, 2026
Forecast Valid:
3pm CDT Apr 6, 2026-6pm CDT Apr 13, 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