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

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

63°F

17°C

Humidity 37%
Wind Speed S 6 mph
Barometer 29.95 in (1014.4 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 16 Feb 4:54 pm CST
Extended Forecast for

Saint Peters MO

  • Tonight

    Tonight: Partly cloudy, with a low around 42. South wind 5 to 8 mph.

    Low: 42 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 67. South wind 5 to 15 mph, with gusts as high as 28 mph.

    High: 67 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms between 2am and 5am. Cloudy during the early evening, then gradual clearing, with a low around 56. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.

    Low: 56 °F

    Mostly Cloudy
    and Breezy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: Sunny, with a high near 72. West wind 6 to 13 mph, with gusts as high as 24 mph.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 47. Light and variable wind becoming south around 5 mph in the evening.

    Low: 47 °F

    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers. Mostly sunny, with a high near 73.

    High: 73 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before midnight. Mostly clear, with a low around 37.

    Low: 37 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Friday Night

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

    Low: 31 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 42. South wind 5 to 8 mph.
Tuesday
Mostly cloudy, with a high near 67. South wind 5 to 15 mph, with gusts as high as 28 mph.
Tuesday Night
A slight chance of showers and thunderstorms between 2am and 5am. Cloudy during the early evening, then gradual clearing, with a low around 56. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 72. West wind 6 to 13 mph, with gusts as high as 24 mph.
Wednesday Night
Partly cloudy, with a low around 47. Light and variable wind becoming south around 5 mph in the evening.
Thursday
A 40 percent chance of showers. Mostly sunny, with a high near 73.
Thursday Night
A 20 percent chance of showers before midnight. Mostly clear, with a low around 37.
Friday
Mostly sunny, with a high near 51.
Friday Night
Partly cloudy, with a low around 31.
Saturday
Mostly sunny, with a high near 48.
Saturday Night
A 20 percent chance of rain. Partly cloudy, with a low around 28.
Sunday
Sunny, with a high near 43.
Sunday Night
Mostly clear, with a low around 22.
Monday
Mostly sunny, with a high near 43.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Peters MO
 38.79°N 90.62°W (Elev. 499 ft)
Last Update:
5:01 pm CST Feb 16, 2026
Forecast Valid:
5pm CST Feb 16, 2026-6pm CST Feb 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation