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

24°F

-4°C

Humidity 75%
Wind Speed Calm
Barometer 30.34 in (1027.7 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Last update 12 Jan 4:54 am CST
Extended Forecast for

5 Miles SE Nebo IL

  • Today

    Today: Sunny, with a high near 50. Southwest wind 6 to 9 mph.

    High: 50 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 36. Southwest wind 6 to 9 mph.

    Low: 36 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 56. West wind 8 to 15 mph, with gusts as high as 24 mph.

    High: 56 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 36. West wind 8 to 11 mph, with gusts as high as 23 mph.

    Low: 36 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature falling to around 31 by 5pm. Northwest wind 11 to 17 mph, with gusts as high as 32 mph.

    High: 40 °F⇓

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Slight Chance
    Snow Showers
    then Mostly
    Cloudy

  • Friday

    Friday: A 20 percent chance of snow showers after noon. Mostly cloudy, with a high near 39.

    High: 39 °F

    Partly Sunny
    then Slight
    Chance Snow
    Showers

Detailed Forecast

Today
Sunny, with a high near 50. Southwest wind 6 to 9 mph.
Tonight
Mostly clear, with a low around 36. Southwest wind 6 to 9 mph.
Tuesday
Increasing clouds, with a high near 56. West wind 8 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 36. West wind 8 to 11 mph, with gusts as high as 23 mph.
Wednesday
Mostly cloudy, with a temperature falling to around 31 by 5pm. Northwest wind 11 to 17 mph, with gusts as high as 32 mph.
Wednesday Night
Partly cloudy, with a low around 16.
Thursday
Mostly sunny, with a high near 30.
Thursday Night
A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 27.
Friday
A 20 percent chance of snow showers after noon. Mostly cloudy, with a high near 39.
Friday Night
Mostly cloudy, with a low around 17.
Saturday
Partly sunny, with a high near 25.
Saturday Night
Partly cloudy, with a low around 9.
Sunday
Mostly sunny, with a high near 25.
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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:
5:01 am CST Jan 12, 2026
Forecast Valid:
5am CST Jan 12, 2026-6pm CST Jan 18, 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