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.

Fair

87°F

31°C

Humidity 53%
Wind Speed E 8 G 18 mph
Barometer 30.19 in (1020.8 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 14 Jul 11:51 am CDT
Extended Forecast for

Saint Ann MO

  • Today

    Today: Sunny, with a high near 90. East wind 6 to 8 mph.

    High: 90 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 73. East wind 5 to 7 mph becoming calm in the evening.

    Low: 73 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92. Calm wind becoming east around 6 mph in the afternoon.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 74. East wind around 5 mph becoming calm in the evening.

    Low: 74 °F

    Mostly Clear

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.

    High: 91 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 75.

    Low: 75 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.

    High: 92 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 76.

    Low: 76 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93.

    High: 93 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 90. East wind 6 to 8 mph.
Tonight
Clear, with a low around 73. East wind 5 to 7 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 92. Calm wind becoming east around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 74. East wind around 5 mph becoming calm in the evening.
Thursday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 75.
Friday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Friday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 76.
Saturday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 76.
Sunday
Mostly sunny, with a high near 92.
Sunday Night
Mostly clear, with a low around 75.
Monday
Mostly sunny, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Ann MO
 38.73°N 90.4°W (Elev. 597 ft)
Last Update:
8:36 am CDT Jul 14, 2026
Forecast Valid:
11am CDT Jul 14, 2026-6pm CDT Jul 20, 2026
 
Forecast Discussion
 
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Additional Resources

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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