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

72°F

22°C

Humidity 73%
Wind Speed W 5 mph
Barometer 29.68 in (1004.4 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 18 Jun 4:54 am CDT
Extended Forecast for

4 Miles SSE Whiteside MO

  • Today

    Today: A 40 percent chance of showers, mainly before 2pm. Partly sunny, with a high near 74. Northwest wind around 6 mph.

    High: 74 °F

    Chance
    Showers

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly clear, with a low around 58. Calm wind.

    Low: 58 °F

    Partly Cloudy
    then Patchy
    Fog

  • Juneteenth

    Juneteenth: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 82. Calm wind.

    High: 82 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 84. Calm wind.

    High: 84 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 90%.

    High: 79 °F

    Showers

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.

    Low: 59 °F

    Showers
    Likely

  • Monday

    Monday: Partly sunny, with a high near 75.

    High: 75 °F

    Partly Sunny

Detailed Forecast

Today
A 40 percent chance of showers, mainly before 2pm. Partly sunny, with a high near 74. Northwest wind around 6 mph.
Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 58. Calm wind.
Juneteenth
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 82. Calm wind.
Friday Night
Partly cloudy, with a low around 63. Calm wind.
Saturday
Mostly sunny, with a high near 84. Calm wind.
Saturday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66.
Sunday
Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 90%.
Sunday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.
Monday
Partly sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 60.
Wednesday
Mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Whiteside MO
 39.13°N 90.98°W (Elev. 738 ft)
Last Update:
4:56 am CDT Jun 18, 2026
Forecast Valid:
5am CDT Jun 18, 2026-6pm CDT Jun 24, 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