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.

Fog/Mist

72°F

22°C

Humidity 97%
Wind Speed Calm
Barometer 29.86 in (1010.8 mb)
Dewpoint 71°F (22°C)
Visibility 5.00 mi
Last update 28 Jun 12:54 am CDT
Extended Forecast for

5 Miles NE Moscow Mills MO

Heat Advisory June 28, 12:00pm until July 3, 12:00am
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly between 3am and 4am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Chance
    T-storms and
    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 8am. Otherwise, sunny, with a high near 93. Heat index values as high as 109. South wind 3 to 8 mph.

    High: 93 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 74. South wind 5 to 7 mph.

    Low: 74 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 94. Heat index values as high as 107. South wind 5 to 9 mph, with gusts as high as 21 mph.

    High: 94 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. South wind around 7 mph.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 75.

    Low: 75 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly between 3am and 4am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 71. Calm wind.
Sunday
Patchy fog before 8am. Otherwise, sunny, with a high near 93. Heat index values as high as 109. South wind 3 to 8 mph.
Sunday Night
Increasing clouds, with a low around 74. South wind 5 to 7 mph.
Monday
Mostly sunny, with a high near 94. Heat index values as high as 107. South wind 5 to 9 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 75. South wind around 7 mph.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Clear, with a low around 75.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
Sunny, with a high near 95.
Thursday Night
Mostly clear, with a low around 75.
Friday
Sunny, with a high near 94.
Friday Night
Mostly clear, with a low around 74.
Independence Day
Sunny, with a high near 93.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NE Moscow Mills MO
 39.01°N 90.87°W (Elev. 587 ft)
Last Update:
1:21 am CDT Jun 28, 2026
Forecast Valid:
1am CDT Jun 28, 2026-6pm CDT Jul 4, 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