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

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

72°F

22°C

Humidity 76%
Wind Speed Calm
Barometer 29.85 in (1010.3 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 17 May 12:54 am CDT
Extended Forecast for

Saint Peters MO

  • Overnight

    Overnight: A 20 percent chance of showers before 3am. Mostly cloudy, with a low around 68. Southeast wind around 6 mph.

    Low: 68 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 91. South wind 8 to 15 mph, with gusts as high as 26 mph.

    High: 91 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 71. South wind 11 to 13 mph, with gusts as high as 23 mph.

    Low: 71 °F

    Increasing
    Clouds

  • Monday

    Monday: Showers likely and possibly a thunderstorm after 11am. Increasing clouds, with a high near 88. South wind around 15 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

    High: 88 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 70. South wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 70 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 86. Chance of precipitation is 90%.

    High: 86 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.

    Low: 59 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 71.

    High: 71 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 53.

    Low: 53 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

Overnight
A 20 percent chance of showers before 3am. Mostly cloudy, with a low around 68. Southeast wind around 6 mph.
Sunday
Mostly sunny, with a high near 91. South wind 8 to 15 mph, with gusts as high as 26 mph.
Sunday Night
Increasing clouds, with a low around 71. South wind 11 to 13 mph, with gusts as high as 23 mph.
Monday
Showers likely and possibly a thunderstorm after 11am. Increasing clouds, with a high near 88. South wind around 15 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Monday Night
A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 70. South wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Tuesday
Showers and possibly a thunderstorm. High near 86. Chance of precipitation is 90%.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.
Wednesday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 71.
Wednesday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 53.
Thursday
Partly sunny, with a high near 71.
Thursday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 53.
Friday
A 20 percent chance of showers. Partly sunny, with a high near 75.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 57.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Peters MO
 38.78°N 90.59°W (Elev. 492 ft)
Last Update:
11:51 pm CDT May 16, 2026
Forecast Valid:
1am CDT May 17, 2026-6pm CDT May 23, 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