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

50°F

10°C

Humidity 86%
Wind Speed SW 10 mph
Barometer 29.67 in (1004.5 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 6 Jan 4:51 am CST
Extended Forecast for

Frontenac MO

  • Today

    Today: Partly sunny, then gradually becoming sunny, with a high near 61. West wind 8 to 10 mph, with gusts as high as 22 mph.

    High: 61 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 36. West wind 5 to 7 mph becoming calm after midnight.

    Low: 36 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 59. Calm wind becoming south around 6 mph in the afternoon.

    High: 59 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain after midnight. Increasing clouds, with a low around 46. South wind around 7 mph.

    Low: 46 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: Rain. High near 63. South wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.

    High: 63 °F

    Rain

  • Thursday Night

    Thursday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance Rain

  • Friday

    Friday: A 20 percent chance of rain. Mostly cloudy, with a high near 55.

    High: 55 °F

    Slight Chance
    Rain

  • Friday Night

    Friday Night: A 30 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny, with a high near 61. West wind 8 to 10 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 36. West wind 5 to 7 mph becoming calm after midnight.
Wednesday
Mostly sunny, with a high near 59. Calm wind becoming south around 6 mph in the afternoon.
Wednesday Night
A 30 percent chance of rain after midnight. Increasing clouds, with a low around 46. South wind around 7 mph.
Thursday
Rain. High near 63. South wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 47.
Friday
A 20 percent chance of rain. Mostly cloudy, with a high near 55.
Friday Night
A 30 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 35.
Saturday
Mostly sunny, with a high near 44.
Saturday Night
Partly cloudy, with a low around 26.
Sunday
Sunny, with a high near 41.
Sunday Night
Mostly clear, with a low around 28.
Monday
Sunny, with a high near 51.
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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:
4:51 am CST Jan 6, 2026
Forecast Valid:
5am CST Jan 6, 2026-6pm CST Jan 12, 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