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

53°F

12°C

Humidity 35%
Wind Speed W 5 mph
Barometer 30.15 in (1021.0 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 12 Jan 4:54 pm CST
Extended Forecast for

5 Miles SE Nebo IL

  • Tonight

    Tonight: Mostly cloudy during the early evening, then becoming clear, with a low around 36. Southwest wind 5 to 9 mph, with gusts as high as 21 mph.

    Low: 36 °F

    Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 57. West wind 9 to 13 mph, with gusts as high as 26 mph.

    High: 57 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain, mainly before 9pm. Mostly cloudy, with a low around 33. West wind 9 to 14 mph, with gusts as high as 24 mph.

    Low: 33 °F

    Chance Rain
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 39. Northwest wind 15 to 17 mph, with gusts as high as 34 mph.

    High: 39 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 16. North wind 8 to 14 mph, with gusts as high as 26 mph.

    Low: 16 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 25.

    Low: 25 °F

    Chance Snow
    then Mostly
    Cloudy

  • Friday

    Friday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 40.

    High: 40 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 17.

    Low: 17 °F

    Slight Chance
    Snow then
    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy during the early evening, then becoming clear, with a low around 36. Southwest wind 5 to 9 mph, with gusts as high as 21 mph.
Tuesday
Increasing clouds, with a high near 57. West wind 9 to 13 mph, with gusts as high as 26 mph.
Tuesday Night
A 30 percent chance of rain, mainly before 9pm. Mostly cloudy, with a low around 33. West wind 9 to 14 mph, with gusts as high as 24 mph.
Wednesday
Partly sunny, with a high near 39. Northwest wind 15 to 17 mph, with gusts as high as 34 mph.
Wednesday Night
Mostly clear, with a low around 16. North wind 8 to 14 mph, with gusts as high as 26 mph.
Thursday
Mostly sunny, with a high near 30.
Thursday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 25.
Friday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 40.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 17.
Saturday
Partly sunny, with a high near 25.
Saturday Night
Partly cloudy, with a low around 7.
Sunday
Mostly sunny, with a high near 23.
Sunday Night
Partly cloudy, with a low around 11.
M.L.King Day
Mostly sunny, with a high near 31.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SE Nebo IL
 39.41°N 90.71°W (Elev. 699 ft)
Last Update:
4:46 pm CST Jan 12, 2026
Forecast Valid:
4pm CST Jan 12, 2026-6pm CST Jan 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation