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

49°F

9°C

Humidity 77%
Wind Speed Calm
Barometer 29.87 in (1010.9 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 21 Mar 4:54 am CDT
Extended Forecast for

Whiteside MO

  • Today

    Today: Sunny, with a high near 90. Light and variable wind becoming south around 6 mph in the morning.

    High: 90 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 63. South wind 5 to 9 mph, with gusts as high as 22 mph.

    Low: 63 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 83. Southwest wind 9 to 16 mph becoming north in the afternoon. Winds could gust as high as 31 mph.

    High: 83 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 37. North wind 9 to 18 mph, with gusts as high as 32 mph.

    Low: 37 °F

    Decreasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 56. Northeast wind around 7 mph.

    High: 56 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 72.

    High: 72 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 90. Light and variable wind becoming south around 6 mph in the morning.
Tonight
Mostly clear, with a low around 63. South wind 5 to 9 mph, with gusts as high as 22 mph.
Sunday
Increasing clouds, with a high near 83. Southwest wind 9 to 16 mph becoming north in the afternoon. Winds could gust as high as 31 mph.
Sunday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 37. North wind 9 to 18 mph, with gusts as high as 32 mph.
Monday
Mostly sunny, with a high near 56. Northeast wind around 7 mph.
Monday Night
Mostly cloudy, with a low around 40.
Tuesday
Partly sunny, with a high near 62.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 43.
Wednesday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 72.
Wednesday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 54.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 79.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 42.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 54.
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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:
4:16 am CDT Mar 21, 2026
Forecast Valid:
5am CDT Mar 21, 2026-6pm CDT Mar 27, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation