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

39°F

4°C

Humidity 93%
Wind Speed E 5 mph
Barometer 29.86 in (1010.9 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 9 Mar 3:54 am CDT
Extended Forecast for

2 Miles W Old Monroe MO

  • Today

    Today: Sunny, with a high near 79. South wind 7 to 13 mph, with gusts as high as 23 mph.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. South wind around 8 mph.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of rain and thunderstorms before 1pm, then a chance of rain between 1pm and 4pm, then a chance of rain and thunderstorms after 4pm. Increasing clouds, with a high near 83. South wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.

    High: 83 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 51. South wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.

    Low: 51 °F

    Rain Likely
    then Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. Temperature rising to near 59 by 10am, then falling to around 49 during the remainder of the day. Southwest wind 13 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%.

    High: 59 °F⇓

    Rain

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 63.

    High: 63 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 79. South wind 7 to 13 mph, with gusts as high as 23 mph.
Tonight
Mostly clear, with a low around 59. South wind around 8 mph.
Tuesday
A slight chance of rain and thunderstorms before 1pm, then a chance of rain between 1pm and 4pm, then a chance of rain and thunderstorms after 4pm. Increasing clouds, with a high near 83. South wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 51. South wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.
Wednesday
Rain and possibly a thunderstorm. Temperature rising to near 59 by 10am, then falling to around 49 during the remainder of the day. Southwest wind 13 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%.
Wednesday Night
Partly cloudy, with a low around 31.
Thursday
Sunny, with a high near 55.
Thursday Night
Mostly cloudy, with a low around 45.
Friday
Partly sunny, with a high near 63.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Partly sunny, with a high near 66.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 47.
Sunday
A 40 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 67.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles W Old Monroe MO
 38.94°N 90.79°W (Elev. 499 ft)
Last Update:
1:26 am CDT Mar 9, 2026
Forecast Valid:
4am CDT Mar 9, 2026-6pm CDT Mar 15, 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