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.

Partly Cloudy

82°F

28°C

Humidity 49%
Wind Speed SW 16 G 22 mph
Barometer 29.60 in (1001.2 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 20 May 2:51 pm CDT
Extended Forecast for

Frontenac MO

  • Tonight

    Tonight: Mostly clear, with a low around 55. West wind 9 to 13 mph, with gusts as high as 23 mph.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 73. West wind 13 to 15 mph, with gusts as high as 29 mph.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52. Northwest wind 7 to 11 mph, with gusts as high as 20 mph.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 67. Northwest wind 10 to 13 mph, with gusts as high as 23 mph.

    High: 67 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 49. Northwest wind 5 to 8 mph becoming calm after midnight.

    Low: 49 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers likely. Mostly cloudy, with a high near 68. Chance of precipitation is 70%.

    High: 68 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 57. Chance of precipitation is 80%.

    Low: 57 °F

    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 55. West wind 9 to 13 mph, with gusts as high as 23 mph.
Wednesday
Sunny, with a high near 73. West wind 13 to 15 mph, with gusts as high as 29 mph.
Wednesday Night
Mostly clear, with a low around 52. Northwest wind 7 to 11 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 67. Northwest wind 10 to 13 mph, with gusts as high as 23 mph.
Thursday Night
Mostly clear, with a low around 49. Northwest wind 5 to 8 mph becoming calm after midnight.
Friday
Mostly sunny, with a high near 71.
Friday Night
A 40 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 55.
Saturday
Showers likely. Mostly cloudy, with a high near 68. Chance of precipitation is 70%.
Saturday Night
Showers and possibly a thunderstorm. Low around 57. Chance of precipitation is 80%.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.
Memorial Day
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 68.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 55.
Tuesday
A 30 percent chance of showers. Mostly sunny, with a high near 71.
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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:
2:37 pm CDT May 20, 2025
Forecast Valid:
3pm CDT May 20, 2025-6pm CDT May 27, 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