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.

A Few Clouds

70°F

21°C

Humidity 90%
Wind Speed W 9 mph
Barometer 29.84 in (1010.0 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 18 Jun 8:54 pm CDT
Extended Forecast for

Dow IL

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, then becoming mostly clear toward daybreak, with a low around 66. West wind around 8 mph.

    Low: 66 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Juneteenth

    Juneteenth: Sunny, with a high near 83. Northwest wind around 8 mph.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 67. West wind around 6 mph becoming light and variable.

    Low: 67 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 89. South wind 6 to 11 mph.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. South wind around 11 mph.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, then becoming mostly clear toward daybreak, with a low around 66. West wind around 8 mph.
Juneteenth
Sunny, with a high near 83. Northwest wind around 8 mph.
Thursday Night
Mostly clear, with a low around 67. West wind around 6 mph becoming light and variable.
Friday
Sunny, with a high near 89. South wind 6 to 11 mph.
Friday Night
Mostly clear, with a low around 75. South wind around 11 mph.
Saturday
Sunny, with a high near 94.
Saturday Night
Mostly clear, with a low around 75.
Sunday
Sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 76.
Monday
Sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 75.
Tuesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 92.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Dow IL
 39.04°N 90.33°W (Elev. 623 ft)
Last Update:
5:52 pm CDT Jun 18, 2025
Forecast Valid:
9pm CDT Jun 18, 2025-6pm CDT Jun 25, 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