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

73°F

23°C

Humidity 94%
Wind Speed Calm
Barometer 30.02 in (1016.2 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 8 Jul 1:54 am CDT
Extended Forecast for

2 Miles N Old Monroe MO

  • Overnight

    Overnight: Patchy fog after 4am. Otherwise, mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 7am. Otherwise, sunny, with a high near 90. Calm wind.

    High: 90 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 71. Calm wind.

    Low: 71 °F

    Mostly Clear

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Partly sunny, with a high near 93. Heat index values as high as 102. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 93 °F

    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 10pm. Low around 73. Light and variable wind. Chance of precipitation is 80%.

    Low: 73 °F

    T-storms
    Likely then
    Showers

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 90.

    High: 90 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 71. Chance of precipitation is 70%.

    Low: 71 °F

    Showers
    Likely

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.

    High: 88 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 30%.

    Low: 70 °F

    Chance
    Showers

Detailed Forecast

Overnight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 68. Calm wind.
Wednesday
Patchy fog before 7am. Otherwise, sunny, with a high near 90. Calm wind.
Wednesday Night
Mostly clear, with a low around 71. Calm wind.
Thursday
A 40 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Partly sunny, with a high near 93. Heat index values as high as 102. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 10pm. Low around 73. Light and variable wind. Chance of precipitation is 80%.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 90.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 71. Chance of precipitation is 70%.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 30%.
Sunday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 89. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 70.
Monday
Sunny, with a high near 91.
Monday Night
Mostly clear, with a low around 71.
Tuesday
Sunny, with a high near 93.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Old Monroe MO
 38.97°N 90.73°W (Elev. 433 ft)
Last Update:
1:26 am CDT Jul 8, 2026
Forecast Valid:
2am CDT Jul 8, 2026-6pm CDT Jul 14, 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