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

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

79°F

26°C

Humidity 32%
Wind Speed E 6 mph
Barometer 30.21 in (1022.3 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 27 Aug 2:51 pm CDT
Extended Forecast for

Saint Ann MO

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 63. Light and variable wind becoming southeast around 6 mph in the evening.

    Low: 63 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 85. South wind 5 to 7 mph.

    High: 85 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62. Southeast wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85. Calm wind becoming northeast around 6 mph in the afternoon.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62. East wind around 6 mph.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 63. Light and variable wind becoming southeast around 6 mph in the evening.
Thursday
Mostly sunny, with a high near 85. South wind 5 to 7 mph.
Thursday Night
Mostly clear, with a low around 62. Southeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 85. Calm wind becoming northeast around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 62. East wind around 6 mph.
Saturday
Sunny, with a high near 83.
Saturday Night
Partly cloudy, with a low around 63.
Sunday
Mostly sunny, with a high near 82.
Sunday Night
Partly cloudy, with a low around 61.
Labor Day
Mostly sunny, with a high near 83.
Monday Night
Mostly clear, with a low around 62.
Tuesday
Mostly sunny, with a high near 86.
Tuesday Night
A 20 percent chance of showers. Mostly clear, with a low around 64.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Ann MO
 38.73°N 90.37°W (Elev. 597 ft)
Last Update:
2:51 pm CDT Aug 27, 2025
Forecast Valid:
3pm CDT Aug 27, 2025-6pm CDT Sep 3, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation