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.

Fair

56°F

13°C

Humidity 72%
Wind Speed SE 6 mph
Barometer 30.01 in (1016.0 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 4 Nov 9:54 pm CST
Extended Forecast for

Hardin IL

  • Tonight

    Tonight: Mostly clear, with a low around 52. South wind around 9 mph.

    Low: 52 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 67. Southwest wind 7 to 15 mph becoming north in the afternoon. Winds could gust as high as 24 mph.

    High: 67 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 36. North wind around 6 mph becoming light and variable.

    Low: 36 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 64. Light east wind becoming southeast 8 to 13 mph in the morning. Winds could gust as high as 23 mph.

    High: 64 °F

    Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers after midnight. Mostly cloudy, with a low around 53. Southeast wind 8 to 10 mph becoming southwest after midnight.

    Low: 53 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before noon. Mostly sunny, with a high near 70.

    High: 70 °F

    Slight Chance
    Showers then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of rain after noon. Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 52. South wind around 9 mph.
Wednesday
Sunny, with a high near 67. Southwest wind 7 to 15 mph becoming north in the afternoon. Winds could gust as high as 24 mph.
Wednesday Night
Mostly clear, with a low around 36. North wind around 6 mph becoming light and variable.
Thursday
Sunny, with a high near 64. Light east wind becoming southeast 8 to 13 mph in the morning. Winds could gust as high as 23 mph.
Thursday Night
A 40 percent chance of showers after midnight. Mostly cloudy, with a low around 53. Southeast wind 8 to 10 mph becoming southwest after midnight.
Friday
A 20 percent chance of showers before noon. Mostly sunny, with a high near 70.
Friday Night
Mostly clear, with a low around 42.
Saturday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 65.
Saturday Night
A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 44.
Sunday Night
Partly cloudy, with a low around 25.
Monday
Sunny, with a high near 43.
Monday Night
Mostly clear, with a low around 25.
Veterans Day
Mostly sunny, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hardin IL
 39.16°N 90.61°W (Elev. 427 ft)
Last Update:
4:46 pm CST Nov 4, 2025
Forecast Valid:
10pm CST Nov 4, 2025-6pm CST Nov 11, 2025
 
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