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.

Overcast

51°F

11°C

Humidity 77%
Wind Speed W 14 mph
Barometer 30.04 in (1017.0 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 4 Apr 11:54 am CDT
Extended Forecast for

4 Miles SSW Hardin IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a steady temperature around 52. West wind 7 to 13 mph, with gusts as high as 26 mph.

    High: 52 °F

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 37. West wind 9 to 13 mph, with gusts as high as 23 mph.

    Low: 37 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 57. Northwest wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 57 °F

    Sunny

  • Sunday Night

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

    Low: 40 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 57. Northwest wind around 8 mph.

    High: 57 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 50.

    High: 50 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 71.

    High: 71 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a steady temperature around 52. West wind 7 to 13 mph, with gusts as high as 26 mph.
Tonight
Partly cloudy, with a low around 37. West wind 9 to 13 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 57. Northwest wind 8 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 40. West wind around 6 mph.
Monday
Sunny, with a high near 57. Northwest wind around 8 mph.
Monday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 35.
Tuesday
Mostly cloudy, with a high near 50.
Tuesday Night
Mostly cloudy, with a low around 41.
Wednesday
Partly sunny, with a high near 71.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 74.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 55.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Hardin IL
 39.1°N 90.64°W (Elev. 758 ft)
Last Update:
11:51 am CDT Apr 4, 2026
Forecast Valid:
12pm CDT Apr 4, 2026-6pm CDT Apr 10, 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