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.

Fair

56°F

13°C

Humidity 93%
Wind Speed Calm
Barometer 29.65 in (1003.9 mb)
Dewpoint 54°F (12°C)
Visibility 9.00 mi
Last update 22 Mar 7:54 am CDT
Extended Forecast for

Whiteside MO

  • Today

    Today: Increasing clouds, with a high near 84. Southwest wind 7 to 17 mph becoming north in the afternoon. Winds could gust as high as 31 mph.

    High: 84 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 36. North wind 9 to 18 mph, with gusts as high as 34 mph.

    Low: 36 °F

    Decreasing
    Clouds

  • Monday

    Monday: Increasing clouds, with a high near 55. Northeast wind around 8 mph.

    High: 55 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 38. East wind around 6 mph.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 64. South wind around 7 mph.

    High: 64 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 59.

    Low: 59 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 87.

    High: 87 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Today
Increasing clouds, with a high near 84. Southwest wind 7 to 17 mph becoming north in the afternoon. Winds could gust as high as 31 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 36. North wind 9 to 18 mph, with gusts as high as 34 mph.
Monday
Increasing clouds, with a high near 55. Northeast wind around 8 mph.
Monday Night
Mostly cloudy, with a low around 38. East wind around 6 mph.
Tuesday
Mostly sunny, with a high near 64. South wind around 7 mph.
Tuesday Night
Mostly cloudy, with a low around 46.
Wednesday
Partly sunny, with a high near 77.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 59.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 87.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 40. Chance of precipitation is 50%.
Friday
A 40 percent chance of showers. Partly sunny, with a high near 52.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 31.
Saturday
Mostly sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Whiteside MO
 39.17°N 91.01°W (Elev. 712 ft)
Last Update:
8:26 am CDT Mar 22, 2026
Forecast Valid:
8am CDT Mar 22, 2026-6pm CDT Mar 28, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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