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

41°F

5°C

Humidity 70%
Wind Speed NE 12 mph
Barometer 30.41 in (1029.9 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 7 Apr 6:54 am CDT
Extended Forecast for

4 Miles SSW Hardin IL

  • Today

    Today: A 20 percent chance of rain before 9am. Cloudy, then gradually becoming mostly sunny, with a high near 53. East wind 9 to 11 mph, with gusts as high as 21 mph.

    High: 53 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 41. East wind around 10 mph, with gusts as high as 20 mph.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72. South wind 10 to 13 mph, with gusts as high as 26 mph.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54. South wind around 11 mph, with gusts as high as 21 mph.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 75. Southwest wind 7 to 9 mph.

    High: 75 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 67. Chance of precipitation is 60%.

    High: 67 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 72.

    High: 72 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
A 20 percent chance of rain before 9am. Cloudy, then gradually becoming mostly sunny, with a high near 53. East wind 9 to 11 mph, with gusts as high as 21 mph.
Tonight
Mostly cloudy, with a low around 41. East wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 72. South wind 10 to 13 mph, with gusts as high as 26 mph.
Wednesday Night
Partly cloudy, with a low around 54. South wind around 11 mph, with gusts as high as 21 mph.
Thursday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 75. Southwest wind 7 to 9 mph.
Thursday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 58.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 67. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 72.
Saturday Night
Mostly cloudy, with a low around 60.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 78.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Monday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Hardin IL
 39.1°N 90.64°W (Elev. 758 ft)
Last Update:
5:21 am CDT Apr 7, 2026
Forecast Valid:
7am CDT Apr 7, 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