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.

Partly Cloudy

51°F

11°C

Humidity 50%
Wind Speed W 9 mph
Barometer 30.12 in (1020.0 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 1 Nov 11:54 am CDT
Extended Forecast for

Dow IL

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

  • This Afternoon

    This Afternoon: A 20 percent chance of rain after 1pm. Mostly cloudy, with a high near 51. West wind around 10 mph.

    High: 51 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: A 20 percent chance of rain before 8pm. Widespread frost, mainly after 3am. Otherwise, partly cloudy, with a low around 31. Northwest wind 3 to 6 mph.

    Low: 31 °F

    Slight Chance
    Rain then
    Frost

  • Sunday

    Sunday: Widespread frost before 9am. Otherwise, sunny, with a high near 54. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 54 °F

    Frost then
    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 37. South wind around 6 mph.

    Low: 37 °F

    Clear

  • Monday

    Monday: Areas of frost before 8am. Otherwise, sunny, with a high near 63. South wind 6 to 10 mph becoming west in the afternoon.

    High: 63 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of rain after 1pm. Mostly cloudy, with a high near 51. West wind around 10 mph.
Tonight
A 20 percent chance of rain before 8pm. Widespread frost, mainly after 3am. Otherwise, partly cloudy, with a low around 31. Northwest wind 3 to 6 mph.
Sunday
Widespread frost before 9am. Otherwise, sunny, with a high near 54. Calm wind becoming southwest around 6 mph in the afternoon.
Sunday Night
Clear, with a low around 37. South wind around 6 mph.
Monday
Areas of frost before 8am. Otherwise, sunny, with a high near 63. South wind 6 to 10 mph becoming west in the afternoon.
Monday Night
Mostly clear, with a low around 39.
Tuesday
Mostly sunny, with a high near 67.
Tuesday Night
Mostly clear, with a low around 49.
Wednesday
Sunny, with a high near 69.
Wednesday Night
Clear, with a low around 41.
Thursday
Sunny, with a high near 66.
Thursday Night
A 20 percent chance of rain. Partly cloudy, with a low around 50.
Friday
A 30 percent chance of rain. Partly sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Dow IL
 39.04°N 90.33°W (Elev. 623 ft)
Last Update:
12:01 pm CDT Nov 1, 2025
Forecast Valid:
12pm CDT Nov 1, 2025-6pm CST Nov 7, 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