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.

Mostly Cloudy

3°F

-16°C

Humidity 34%
Wind Speed NE 12 mph
Barometer 30.72 in (1041.4 mb)
Dewpoint -19°F (-28°C)
Visibility 10.00 mi
Wind Chill-14°F (-26°C)
Last update 23 Jan 10:54 pm CST
Extended Forecast for

3 Miles SSW Dow IL

Cold Weather Advisory January 23, 11:39pm until January 24, 12:00pm
Winter Storm Warning January 24, 09:00am until January 25, 06:00pm
Click here for hazard details and duration
Cold Weather Advisory
Winter Storm Warning
  •  
    Cold Weather Advisory January 23, 11:39pm until January 24, 12:00pm

    NOW until 12:00pm Sat

    Cold Weather Advisory

  • Tonight

    Low: 1 °F

    Mostly Cloudy

  • Saturday

    Saturday: Snow, mainly after noon. High near 11. Wind chill values as low as -15. Northeast wind around 11 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 11 °F

    Chance Snow
    then Snow

  • Saturday Night

    Saturday Night: Snow. Low around 9. North wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    Low: 9 °F

    Snow Likely
    then Snow

  • Sunday

    Sunday: Snow, mainly before 2pm. High near 15. North wind 13 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 15 °F

    Snow

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before midnight. Partly cloudy, with a low around -1. Northwest wind 10 to 13 mph, with gusts as high as 20 mph.

    Low: -1 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Monday

    Monday: Sunny and cold, with a high near 14.

    High: 14 °F

    Cold

  • Monday Night

    Monday Night: Mostly clear, with a low around 4.

    Low: 4 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

Detailed Forecast

Tonight
Mostly cloudy, with a low around 1. Wind chill values as low as -15. Northeast wind 11 to 13 mph.
Saturday
Snow, mainly after noon. High near 11. Wind chill values as low as -15. Northeast wind around 11 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Saturday Night
Snow. Low around 9. North wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Sunday
Snow, mainly before 2pm. High near 15. North wind 13 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Sunday Night
A 20 percent chance of snow before midnight. Partly cloudy, with a low around -1. Northwest wind 10 to 13 mph, with gusts as high as 20 mph.
Monday
Sunny and cold, with a high near 14.
Monday Night
Mostly clear, with a low around 4.
Tuesday
Mostly sunny, with a high near 30.
Tuesday Night
Partly cloudy, with a low around 5.
Wednesday
Partly sunny, with a high near 24.
Wednesday Night
Partly cloudy, with a low around 4.
Thursday
Mostly sunny and cold, with a high near 19.
Thursday Night
Partly cloudy, with a low around 5.
Friday
Mostly sunny, with a high near 21.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Dow IL
 39°N 90.33°W (Elev. 597 ft)
Last Update:
10:26 pm CST Jan 23, 2026
Forecast Valid:
11pm CST Jan 23, 2026-6pm CST Jan 30, 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