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.

Fair

51°F

11°C

Humidity 59%
Wind Speed Vrbl 3 mph
Barometer 29.83 in (1009.8 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 8 Nov 1:54 am CST
Extended Forecast for

3 Miles ESE Dow IL

  • Overnight

    Overnight: Mostly clear early, then becoming mostly cloudy, with a low around 41. North wind 3 to 6 mph.

    Low: 41 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of rain, mainly after 4pm. Mostly cloudy, with a high near 63. Calm wind becoming east 5 to 7 mph in the afternoon.

    High: 63 °F

    Mostly Cloudy
    then Chance
    Rain

  • Saturday Night

    Saturday Night: A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 33. Breezy, with a northwest wind 7 to 12 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 29 mph.

    Low: 33 °F

    Chance Rain
    then Mostly
    Cloudy and
    Breezy

  • Sunday

    Sunday: A chance of flurries before 1pm, then a chance of sprinkles and flurries between 1pm and 4pm, then a chance of flurries after 4pm. Mostly cloudy, then gradually becoming sunny, with a high near 39. Breezy, with a northwest wind 15 to 21 mph, with gusts as high as 31 mph.

    High: 39 °F

    Breezy.
    Chance
    Flurries then
    Chance
    Sprinkles/Flurries

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 23. Northwest wind 10 to 13 mph, with gusts as high as 22 mph.

    Low: 23 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 41.

    High: 41 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 26.

    Low: 26 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny

  • Tuesday Night

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

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear early, then becoming mostly cloudy, with a low around 41. North wind 3 to 6 mph.
Saturday
A 30 percent chance of rain, mainly after 4pm. Mostly cloudy, with a high near 63. Calm wind becoming east 5 to 7 mph in the afternoon.
Saturday Night
A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 33. Breezy, with a northwest wind 7 to 12 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 29 mph.
Sunday
A chance of flurries before 1pm, then a chance of sprinkles and flurries between 1pm and 4pm, then a chance of flurries after 4pm. Mostly cloudy, then gradually becoming sunny, with a high near 39. Breezy, with a northwest wind 15 to 21 mph, with gusts as high as 31 mph.
Sunday Night
Mostly clear, with a low around 23. Northwest wind 10 to 13 mph, with gusts as high as 22 mph.
Monday
Sunny, with a high near 41.
Monday Night
Mostly clear, with a low around 26.
Veterans Day
Partly sunny, with a high near 56.
Tuesday Night
Mostly clear, with a low around 40.
Wednesday
Sunny, with a high near 62.
Wednesday Night
Mostly clear, with a low around 36.
Thursday
Mostly sunny, with a high near 61.
Thursday Night
Partly cloudy, with a low around 41.
Friday
Mostly sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Dow IL
 39.04°N 90.27°W (Elev. 600 ft)
Last Update:
1:56 am CST Nov 8, 2025
Forecast Valid:
2am CST Nov 8, 2025-6pm CST Nov 14, 2025
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation