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.

Overcast

41°F

5°C

Humidity 73%
Wind Speed S 12 mph
Barometer 29.91 in (1013.3 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 6 Dec 10:51 pm CST
Extended Forecast for

Frontenac MO

  • Tonight

    Tonight: A slight chance of rain between midnight and 1am. Cloudy, with a low around 37. South wind 3 to 6 mph. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

    Low: 37 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: A slight chance of drizzle before 3pm. Cloudy, with a temperature rising to near 39 by 8am, then falling to around 32 during the remainder of the day. Light and variable wind becoming north 6 to 11 mph in the morning. Winds could gust as high as 22 mph.

    High: 39 °F⇓

    Slight Chance
    Drizzle

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 19. North wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 19 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 33. North wind around 5 mph becoming calm in the morning.

    High: 33 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 26. Light southeast wind becoming southwest 5 to 9 mph in the evening.

    Low: 26 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy
    then Slight
    Chance Snow

Detailed Forecast

Tonight
A slight chance of rain between midnight and 1am. Cloudy, with a low around 37. South wind 3 to 6 mph. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Sunday
A slight chance of drizzle before 3pm. Cloudy, with a temperature rising to near 39 by 8am, then falling to around 32 during the remainder of the day. Light and variable wind becoming north 6 to 11 mph in the morning. Winds could gust as high as 22 mph.
Sunday Night
Mostly cloudy, with a low around 19. North wind 6 to 10 mph, with gusts as high as 20 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 33. North wind around 5 mph becoming calm in the morning.
Monday Night
Partly cloudy, with a low around 26. Light southeast wind becoming southwest 5 to 9 mph in the evening.
Tuesday
Mostly sunny, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 40.
Wednesday
Partly sunny, with a high near 48.
Wednesday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 28.
Thursday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 38.
Thursday Night
Mostly cloudy, with a low around 20.
Friday
Partly sunny, with a high near 28.
Friday Night
Partly cloudy, with a low around 10.
Saturday
Mostly sunny, with a high near 24.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Frontenac MO
 38.62°N 90.4°W (Elev. 597 ft)
Last Update:
9:46 pm CST Dec 6, 2025
Forecast Valid:
11pm CST Dec 6, 2025-6pm CST Dec 13, 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