National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fog/Mist

53°F

12°C

Humidity 96%
Wind Speed E 9 mph
Barometer 29.78 in (1008.2 mb)
Dewpoint 52°F (11°C)
Visibility 1.50 mi
Wind Chill50°F (10°C)
Last update 27 Dec 3:54 pm CST
Extended Forecast for

Hardin ILSimilar City Names

  • Tonight

    Tonight: A 20 percent chance of rain after midnight. Cloudy, with a low around 57. South wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 57 °F

    Cloudy then
    Slight Chance
    Rain

  • Sunday

    Sunday: Rain and thunderstorms. Temperature rising to near 66 by noon, then falling to around 46 during the remainder of the day. Breezy, with a south wind 9 to 14 mph becoming northwest 19 to 24 mph in the afternoon. Winds could gust as high as 37 mph. Chance of precipitation is 80%.

    High: 66 °F⇓

    Chance
    T-storms then
    Rain and
    Breezy

  • Sunday Night

    Sunday Night: Cloudy during the early evening, then gradual clearing, with a low around 18. Breezy, with a west wind around 25 mph, with gusts as high as 39 mph.

    Low: 18 °F

    Gradual
    Clearing and
    Breezy

  • Monday

    Monday: Mostly sunny, with a high near 27. Breezy, with a northwest wind 14 to 24 mph, with gusts as high as 37 mph.

    High: 27 °F

    Partly Sunny
    and Breezy
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 15. Northwest wind 9 to 13 mph, with gusts as high as 25 mph.

    Low: 15 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 34.

    High: 34 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of rain after midnight. Cloudy, with a low around 57. South wind 8 to 11 mph, with gusts as high as 21 mph.
Sunday
Rain and thunderstorms. Temperature rising to near 66 by noon, then falling to around 46 during the remainder of the day. Breezy, with a south wind 9 to 14 mph becoming northwest 19 to 24 mph in the afternoon. Winds could gust as high as 37 mph. Chance of precipitation is 80%.
Sunday Night
Cloudy during the early evening, then gradual clearing, with a low around 18. Breezy, with a west wind around 25 mph, with gusts as high as 39 mph.
Monday
Mostly sunny, with a high near 27. Breezy, with a northwest wind 14 to 24 mph, with gusts as high as 37 mph.
Monday Night
Mostly clear, with a low around 15. Northwest wind 9 to 13 mph, with gusts as high as 25 mph.
Tuesday
Sunny, with a high near 34.
Tuesday Night
Mostly clear, with a low around 25.
Wednesday
Mostly sunny, with a high near 43.
Wednesday Night
Partly cloudy, with a low around 25.
New Year's Day
Mostly sunny, with a high near 37.
Thursday Night
Partly cloudy, with a low around 18.
Friday
Partly sunny, with a high near 40.
Friday Night
Mostly cloudy, with a low around 28.
Saturday
Mostly cloudy, with a high near 46.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hardin ILSimilar City Names
 39.14°N 90.61°W (Elev. 427 ft)
Last Update:
3:16 pm CST Dec 27, 2025
Forecast Valid:
4pm CST Dec 27, 2025-6pm CST Jan 3, 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