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.

A Few Clouds

64°F

18°C

Humidity 70%
Wind Speed S 9 mph
Barometer 29.85 in (1010.5 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 14 Nov 9:54 pm CST
Extended Forecast for

4 Miles W Dow IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 59. South wind around 9 mph.

    Low: 59 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 77. Southwest wind 9 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 77 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 42. North wind 7 to 9 mph.

    Low: 42 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58. North wind around 6 mph.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36. Calm wind becoming east around 5 mph after midnight.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: A 40 percent chance of rain after noon. Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny
    then Chance
    Rain

  • Monday Night

    Monday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Rain Likely
    then Chance
    Rain

  • Tuesday

    Tuesday: A 20 percent chance of rain before noon. Partly sunny, with a high near 58.

    High: 58 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 59. South wind around 9 mph.
Saturday
Mostly sunny, with a high near 77. Southwest wind 9 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Mostly clear, with a low around 42. North wind 7 to 9 mph.
Sunday
Sunny, with a high near 58. North wind around 6 mph.
Sunday Night
Mostly clear, with a low around 36. Calm wind becoming east around 5 mph after midnight.
Monday
A 40 percent chance of rain after noon. Mostly sunny, with a high near 57.
Monday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Tuesday
A 20 percent chance of rain before noon. Partly sunny, with a high near 58.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
A 20 percent chance of rain. Partly sunny, with a high near 57.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 45.
Thursday
Rain likely. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 44.
Friday
A 40 percent chance of rain. Partly sunny, with a high near 58.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Dow IL
 39.04°N 90.38°W (Elev. 614 ft)
Last Update:
8:51 pm CST Nov 14, 2025
Forecast Valid:
10pm CST Nov 14, 2025-6pm CST Nov 21, 2025
 
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