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.

Mostly Cloudy

77°F

25°C

Humidity 43%
Wind Speed S 9 mph
Barometer 29.60 in (1001.4 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 4 May 7:51 pm CDT
Extended Forecast for

Saint Charles MO

  • Tonight

    Tonight: Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 11pm. Mostly cloudy, with a low around 55. Southwest wind 5 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    Low: 55 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm before noon, then showers likely between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Temperature falling to around 54 by 5pm. Northeast wind 7 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.

    High: 57 °F⇓

    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 8pm, then showers likely. Low around 45. North wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    Low: 45 °F

    Showers then
    Scattered
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 58. North wind 6 to 8 mph.

    High: 58 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 42. North wind 3 to 6 mph.

    Low: 42 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 73.

    High: 73 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 50. Chance of precipitation is 30%.

    Low: 50 °F

    Chance
    Showers

Detailed Forecast

Tonight
Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 11pm. Mostly cloudy, with a low around 55. Southwest wind 5 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Tuesday
Showers and possibly a thunderstorm before noon, then showers likely between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Temperature falling to around 54 by 5pm. Northeast wind 7 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.
Tuesday Night
Showers and possibly a thunderstorm before 8pm, then showers likely. Low around 45. North wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Wednesday
A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 58. North wind 6 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 42. North wind 3 to 6 mph.
Thursday
Sunny, with a high near 65.
Thursday Night
Mostly clear, with a low around 47.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 73.
Friday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 50. Chance of precipitation is 30%.
Saturday
Sunny, with a high near 78.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 55.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 74.
Sunday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 52.
Monday
A 20 percent chance of showers. Mostly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Charles MO
 38.78°N 90.51°W (Elev. 597 ft)
Last Update:
5:26 pm CDT May 4, 2026
Forecast Valid:
8pm CDT May 4, 2026-6pm CDT May 11, 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