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

56°F

13°C

Humidity 67%
Wind Speed S 5 mph
Barometer 30.11 in (1019.5 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 21 Apr 12:54 am CDT
Extended Forecast for

Whiteside MO

  • Overnight

    Overnight: Mostly clear, with a low around 51. Southwest wind 7 to 9 mph.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 78. Southwest wind 9 to 16 mph, with gusts as high as 30 mph.

    High: 78 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56. Southwest wind 9 to 11 mph, with gusts as high as 22 mph.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. Southwest wind around 7 mph.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58. South wind around 6 mph.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 60. Chance of precipitation is 80%.

    Low: 60 °F

    Chance
    T-storms then
    Showers

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 74. Chance of precipitation is 70%.

    High: 74 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 51. Chance of precipitation is 30%.

    Low: 51 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 51. Southwest wind 7 to 9 mph.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 78. Southwest wind 9 to 16 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly clear, with a low around 56. Southwest wind 9 to 11 mph, with gusts as high as 22 mph.
Wednesday
Mostly sunny, with a high near 77. Southwest wind around 7 mph.
Wednesday Night
Mostly clear, with a low around 58. South wind around 6 mph.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 60. Chance of precipitation is 80%.
Friday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 74. Chance of precipitation is 70%.
Friday Night
A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 51. Chance of precipitation is 30%.
Saturday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 71.
Saturday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 51.
Sunday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 71.
Sunday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.
Monday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Chance of precipitation is 60%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Whiteside MO
 39.17°N 91.01°W (Elev. 712 ft)
Last Update:
1:25 am CDT Apr 21, 2026
Forecast Valid:
1am CDT Apr 21, 2026-6pm CDT Apr 27, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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