National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Fog/Mist

49°F

9°C

Humidity 93%
Wind Speed NE 8 mph
Barometer 30.09 in (1019.1 mb)
Dewpoint 47°F (8°C)
Visibility 5.00 mi
Wind Chill46°F (8°C)
Last update 3 Mar 8:51 pm CST
Extended Forecast for

Saint Charles MO

  • Tonight

    Tonight: A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 3am. Cloudy, with a low around 49. Northeast wind 3 to 7 mph. Chance of precipitation is 70%.

    Low: 49 °F

    Chance
    T-storms then
    Rain Likely

  • Wednesday

    Wednesday: Rain and thunderstorms likely, then showers and possibly a thunderstorm after 2pm. Patchy fog before 11am. High near 61. Northwest wind around 6 mph becoming calm in the afternoon. Chance of precipitation is 80%.

    High: 61 °F

    Chance
    T-storms and
    Patchy Fog
    then Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Patchy fog between 1am and 2am. Low around 54. East wind around 5 mph becoming calm after midnight. Chance of precipitation is 100%.

    Low: 54 °F

    T-storms and
    Patchy Fog
    then Showers
    and Patchy
    Fog

  • Thursday

    Thursday: Showers likely, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 68. West wind 3 to 7 mph. Chance of precipitation is 60%.

    High: 68 °F

    Showers
    Likely then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 58. Calm wind becoming south 5 to 8 mph in the evening. Chance of precipitation is 60%.

    Low: 58 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 40%.

    High: 79 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 58. Chance of precipitation is 90%.

    Low: 58 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers before noon. Mostly cloudy, with a high near 67.

    High: 67 °F

    Chance
    Showers then
    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 3am. Cloudy, with a low around 49. Northeast wind 3 to 7 mph. Chance of precipitation is 70%.
Wednesday
Rain and thunderstorms likely, then showers and possibly a thunderstorm after 2pm. Patchy fog before 11am. High near 61. Northwest wind around 6 mph becoming calm in the afternoon. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm. Patchy fog between 1am and 2am. Low around 54. East wind around 5 mph becoming calm after midnight. Chance of precipitation is 100%.
Thursday
Showers likely, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 68. West wind 3 to 7 mph. Chance of precipitation is 60%.
Thursday Night
A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 58. Calm wind becoming south 5 to 8 mph in the evening. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 58. Chance of precipitation is 90%.
Saturday
A 40 percent chance of showers before noon. Mostly cloudy, with a high near 67.
Saturday Night
Partly cloudy, with a low around 44.
Sunday
Sunny, with a high near 69.
Sunday Night
Mostly clear, with a low around 48.
Monday
A 20 percent chance of showers. Sunny, with a high near 76.
Monday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 59.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 76. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Charles MO
 38.78°N 90.51°W (Elev. 597 ft)
Last Update:
8:52 pm CST Mar 3, 2026
Forecast Valid:
9pm CST Mar 3, 2026-6pm CDT Mar 10, 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