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

55°F

13°C

Humidity 87%
Wind Speed W 3 mph
Barometer 30.00 in (1015.1 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 11 Oct 4:51 am CDT
Extended Forecast for

Frontenac MO

  • Today

    Today: Sunny, with a high near 89. Light and variable wind.

    High: 89 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 68. Light and variable wind becoming south around 6 mph in the evening.

    Low: 68 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Sunny, with a high near 94. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 72. South wind around 8 mph.

    Low: 72 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. Southwest wind around 8 mph.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 71.

    Low: 71 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 83. Chance of precipitation is 80%.

    High: 83 °F

    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.

    Low: 65 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 78. Chance of precipitation is 70%.

    High: 78 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 89. Light and variable wind.
Tonight
Partly cloudy, with a low around 68. Light and variable wind becoming south around 6 mph in the evening.
Columbus Day
Sunny, with a high near 94. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Monday Night
Clear, with a low around 72. South wind around 8 mph.
Tuesday
Sunny, with a high near 94. Southwest wind around 8 mph.
Tuesday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 71.
Wednesday
Showers and possibly a thunderstorm. High near 83. Chance of precipitation is 80%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Thursday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 78. Chance of precipitation is 70%.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
Friday
A 20 percent chance of showers. Partly sunny, with a high near 67.
Friday Night
Partly cloudy, with a low around 44.
Saturday
Sunny, with a high near 61.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Frontenac MO
 38.62°N 90.43°W (Elev. 597 ft)
Last Update:
3:16 am CDT Oct 11, 2026
Forecast Valid:
5am CDT Oct 11, 2026-6pm CDT Oct 17, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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