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

66°F

19°C

Humidity 70%
Wind Speed SE 10 mph
Barometer 29.98 in (1014.1 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 17 Oct 2:51 am CDT
Extended Forecast for

Frontenac MO

  • Overnight

    Overnight: Mostly cloudy, with a low around 63. Southeast wind around 8 mph.

    Low: 63 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 83. South wind 7 to 9 mph.

    High: 83 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 65. South wind 7 to 9 mph.

    Low: 65 °F

    Partly Cloudy

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 81. Southwest wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.

    High: 81 °F

    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 51. Southwest wind 8 to 13 mph becoming west after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 70%.

    Low: 51 °F

    Showers
    Likely

  • Sunday

    Sunday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 47.

    Low: 47 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Monday Night

    Monday Night: A 40 percent chance of showers. Partly cloudy, with a low around 52.

    Low: 52 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 63. Southeast wind around 8 mph.
Friday
Partly sunny, with a high near 83. South wind 7 to 9 mph.
Friday Night
Partly cloudy, with a low around 65. South wind 7 to 9 mph.
Saturday
Showers and possibly a thunderstorm. High near 81. Southwest wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.
Saturday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 51. Southwest wind 8 to 13 mph becoming west after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 70%.
Sunday
Sunny, with a high near 65.
Sunday Night
Clear, with a low around 47.
Monday
Sunny, with a high near 74.
Monday Night
A 40 percent chance of showers. Partly cloudy, with a low around 52.
Tuesday
A 20 percent chance of showers before 1pm. Sunny, with a high near 65.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Sunny, with a high near 66.
Wednesday Night
Partly cloudy, with a low around 48.
Thursday
Mostly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Frontenac MO
 38.62°N 90.43°W (Elev. 597 ft)
Last Update:
1:16 am CDT Oct 17, 2025
Forecast Valid:
2am CDT Oct 17, 2025-6pm CDT Oct 23, 2025
 
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