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

47°F

8°C

Humidity 66%
Wind Speed S 8 mph
Barometer 29.95 in (1014.8 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 9 Feb 10:51 pm CST
Extended Forecast for

Frontenac MO

  • Tonight

    Tonight: Clear, with a temperature rising to around 50 by 5am. South wind around 7 mph.

    Low: 43 °F⇑

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 64. Southwest wind 6 to 10 mph becoming north in the afternoon.

    High: 64 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 32. North wind 5 to 7 mph.

    Low: 32 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 51. North wind 3 to 6 mph.

    High: 51 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 33. Calm wind.

    Low: 33 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 47.

    High: 47 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: A 30 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Chance Rain

  • Friday

    Friday: Mostly cloudy, with a high near 48.

    High: 48 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 30 percent chance of rain, mainly after midnight. Cloudy, with a low around 37.

    Low: 37 °F

    Chance Rain

Detailed Forecast

Tonight
Clear, with a temperature rising to around 50 by 5am. South wind around 7 mph.
Tuesday
Sunny, with a high near 64. Southwest wind 6 to 10 mph becoming north in the afternoon.
Tuesday Night
Partly cloudy, with a low around 32. North wind 5 to 7 mph.
Wednesday
Mostly sunny, with a high near 51. North wind 3 to 6 mph.
Wednesday Night
Mostly cloudy, with a low around 33. Calm wind.
Thursday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 47.
Thursday Night
A 30 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 34.
Friday
Mostly cloudy, with a high near 48.
Friday Night
A 30 percent chance of rain, mainly after midnight. Cloudy, with a low around 37.
Saturday
Rain likely, mainly after noon. Cloudy, with a high near 48. Chance of precipitation is 70%.
Saturday Night
Rain. Low around 38. Chance of precipitation is 80%.
Sunday
A 40 percent chance of rain. Mostly sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 35.
Washington's Birthday
Mostly sunny, with a high near 59.
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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:
10:31 pm CST Feb 9, 2026
Forecast Valid:
11pm CST Feb 9, 2026-6pm CST Feb 16, 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