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.

Fair

34°F

1°C

Humidity 97%
Wind Speed Calm
Barometer 30.20 in (1022.6 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 1 Nov 11:54 pm CST
Extended Forecast for

3 Miles WNW Hardin IL

Freeze Warning November 2, 01:00am until November 2, 07:00am
Click here for hazard details and duration
Freeze Warning

  • Overnight

    Overnight: Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 31. Calm wind.

    Low: 31 °F

    Frost

  • Sunday

    Sunday: Patchy fog before 10am. Widespread frost, mainly before 9am. Otherwise, sunny, with a high near 54. Light and variable wind.

    High: 54 °F

    Frost and
    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 36. Calm wind becoming south around 5 mph after midnight.

    Low: 36 °F

    Clear

  • Monday

    Monday: Areas of frost before 8am. Otherwise, sunny, with a high near 64. South wind around 6 mph becoming west in the afternoon.

    High: 64 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Overnight
Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 31. Calm wind.
Sunday
Patchy fog before 10am. Widespread frost, mainly before 9am. Otherwise, sunny, with a high near 54. Light and variable wind.
Sunday Night
Clear, with a low around 36. Calm wind becoming south around 5 mph after midnight.
Monday
Areas of frost before 8am. Otherwise, sunny, with a high near 64. South wind around 6 mph becoming west in the afternoon.
Monday Night
Partly cloudy, with a low around 41. Calm wind.
Tuesday
Mostly sunny, with a high near 69.
Tuesday Night
Partly cloudy, with a low around 49.
Wednesday
Sunny, with a high near 68.
Wednesday Night
Mostly clear, with a low around 40.
Thursday
Mostly sunny, with a high near 67.
Thursday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 53.
Friday
A 20 percent chance of rain and thunderstorms. Mostly sunny, with a high near 70.
Friday Night
Partly cloudy, with a low around 48.
Saturday
A 20 percent chance of rain. Mostly sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Hardin IL
 39.16°N 90.69°W (Elev. 430 ft)
Last Update:
12:41 am CDT Nov 2, 2025
Forecast Valid:
1am CDT Nov 2, 2025-6pm CST Nov 8, 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