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

59°F

15°C

Humidity 67%
Wind Speed W 14 G 22 mph
Barometer 29.80 in (1008.8 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 4 Nov 11:54 am CST
Extended Forecast for

Hardin IL

  • This Afternoon

    This Afternoon: Patchy drizzle before 1pm. Cloudy, with a high near 58. West wind 9 to 13 mph, with gusts as high as 21 mph.

    High: 58 °F

    Patchy
    Drizzle

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 43. West wind 5 to 7 mph.

    Low: 43 °F

    Gradual
    Clearing

  • Thursday

    Thursday: Increasing clouds, with a high near 61. West wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 61 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Isolated showers between 7pm and 10pm. Mostly cloudy, with a low around 43. Northwest wind 3 to 7 mph. Chance of precipitation is 20%.

    Low: 43 °F

    Isolated
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 57. North wind 7 to 10 mph.

    High: 57 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

Detailed Forecast

This Afternoon
Patchy drizzle before 1pm. Cloudy, with a high near 58. West wind 9 to 13 mph, with gusts as high as 21 mph.
Tonight
Cloudy during the early evening, then gradual clearing, with a low around 43. West wind 5 to 7 mph.
Thursday
Increasing clouds, with a high near 61. West wind 8 to 13 mph, with gusts as high as 20 mph.
Thursday Night
Isolated showers between 7pm and 10pm. Mostly cloudy, with a low around 43. Northwest wind 3 to 7 mph. Chance of precipitation is 20%.
Friday
Partly sunny, with a high near 57. North wind 7 to 10 mph.
Friday Night
Partly cloudy, with a low around 34.
Saturday
Mostly sunny, with a high near 56.
Saturday Night
Partly cloudy, with a low around 34.
Sunday
Sunny, with a high near 62.
Sunday Night
Clear, with a low around 35.
Monday
Sunny, with a high near 67.
Monday Night
Clear, with a low around 40.
Tuesday
Sunny, with a high near 69.
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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:
11:31 am CST Nov 4, 2026
Forecast Valid:
12pm CST Nov 4, 2026-6pm CST Nov 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