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

33°F

1°C

Humidity 78%
Wind Speed Calm
Barometer 30.11 in (1020.0 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 12 Jan 8:54 pm CST
Extended Forecast for

2 Miles S Hardin IL

  • Tonight

    Tonight: Mostly clear, with a low around 37. Calm wind becoming southwest 5 to 8 mph in the evening.

    Low: 37 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 59. West wind 8 to 14 mph, with gusts as high as 26 mph.

    High: 59 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain, mainly before 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 35. West wind 9 to 13 mph, with gusts as high as 23 mph.

    Low: 35 °F

    Chance Rain
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a temperature rising to near 40 by 11am, then falling to around 32 during the remainder of the day. Northwest wind 14 to 18 mph, with gusts as high as 34 mph.

    High: 40 °F⇓

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 17. North wind 7 to 13 mph, with gusts as high as 23 mph.

    Low: 17 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 32.

    High: 32 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 41.

    High: 41 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 37. Calm wind becoming southwest 5 to 8 mph in the evening.
Tuesday
Increasing clouds, with a high near 59. West wind 8 to 14 mph, with gusts as high as 26 mph.
Tuesday Night
A 30 percent chance of rain, mainly before 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 35. West wind 9 to 13 mph, with gusts as high as 23 mph.
Wednesday
Partly sunny, with a temperature rising to near 40 by 11am, then falling to around 32 during the remainder of the day. Northwest wind 14 to 18 mph, with gusts as high as 34 mph.
Wednesday Night
Mostly clear, with a low around 17. North wind 7 to 13 mph, with gusts as high as 23 mph.
Thursday
Mostly sunny, with a high near 32.
Thursday Night
Mostly cloudy, with a low around 25.
Friday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 41.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
Partly sunny, with a high near 27.
Saturday Night
Partly cloudy, with a low around 9.
Sunday
Mostly sunny, with a high near 25.
Sunday Night
Partly cloudy, with a low around 12.
M.L.King Day
Mostly sunny, with a high near 34.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Hardin IL
 39.12°N 90.61°W (Elev. 420 ft)
Last Update:
8:26 pm CST Jan 12, 2026
Forecast Valid:
9pm CST Jan 12, 2026-6pm CST Jan 19, 2026
 
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