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.

Fog/Mist

15°F

-9°C

Humidity 91%
Wind Speed E 8 mph
Barometer 30.06 in (1018.5 mb)
Dewpoint 13°F (-11°C)
Visibility 6.00 mi
Wind Chill4°F (-16°C)
Last update 3 Dec 2:54 am CST
Extended Forecast for

5 Miles W Dow IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 18. Southeast wind around 6 mph.

    Low: 18 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of snow between 3pm and 5pm, then a chance of rain after 5pm. Mostly cloudy, with a high near 37. South wind 5 to 8 mph becoming northwest in the afternoon. Chance of precipitation is 50%.

    High: 37 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow likely before 2am, then a chance of flurries between 2am and 3am. Cloudy, with a low around 9. North wind 7 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 9 °F

    Snow Likely
    then Slight
    Chance Snow

  • Thursday

    Thursday: Sunny, with a high near 21. North wind 5 to 8 mph becoming calm in the afternoon.

    High: 21 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 8. Calm wind becoming south around 5 mph after midnight.

    Low: 8 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 35.

    High: 35 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 18. Southeast wind around 6 mph.
Wednesday
A chance of snow between 3pm and 5pm, then a chance of rain after 5pm. Mostly cloudy, with a high near 37. South wind 5 to 8 mph becoming northwest in the afternoon. Chance of precipitation is 50%.
Wednesday Night
Snow likely before 2am, then a chance of flurries between 2am and 3am. Cloudy, with a low around 9. North wind 7 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday
Sunny, with a high near 21. North wind 5 to 8 mph becoming calm in the afternoon.
Thursday Night
Partly cloudy, with a low around 8. Calm wind becoming south around 5 mph after midnight.
Friday
Mostly sunny, with a high near 36.
Friday Night
Mostly cloudy, with a low around 21.
Saturday
Partly sunny, with a high near 35.
Saturday Night
Mostly cloudy, with a low around 23.
Sunday
A slight chance of rain and snow after noon. Mostly cloudy, with a high near 33. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 21.
Monday
Partly sunny, with a high near 33.
Monday Night
Mostly cloudy, with a low around 25.
Tuesday
Partly sunny, with a high near 41.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles W Dow IL
 39.05°N 90.41°W (Elev. 600 ft)
Last Update:
2:40 am CST Dec 3, 2025
Forecast Valid:
3am CST Dec 3, 2025-6pm CST Dec 9, 2025
 
Forecast Discussion
 
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Additional Resources

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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