National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Partly Cloudy

28°C

82°F

Humidity 65%
Wind Speed N 6 km/h
Barometer 1013.8 mb (29.97 in)
Dewpoint 21°C (69°F)
Visibility 16 km
Heat Index29°C (85°F)
Last update 12 Jul 7:51 pm CDT
Extended Forecast for

Frontenac MO

  • Tonight

    Tonight: Partly cloudy, with a low around 23. Calm wind.

    Low: 23 °C

    Partly Cloudy

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly after 4pm. Mostly cloudy, with a high near 30. Calm wind. Chance of precipitation is 60%.

    High: 30 °C

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely before 7pm. Mostly cloudy, with a low around 22. Calm wind. Chance of precipitation is 60%.

    Low: 22 °C

    T-storms
    Likely then
    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 32. Calm wind becoming southeast 5 to 10 km/h in the afternoon.

    High: 32 °C

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 23. Southeast wind 3 to 8 km/h.

    Low: 23 °C

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 32.

    High: 32 °C

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 23.

    Low: 23 °C

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 34.

    High: 34 °C

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 23.

    Low: 23 °C

    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 23. Calm wind.
Sunday
Showers and thunderstorms likely, mainly after 4pm. Mostly cloudy, with a high near 30. Calm wind. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms likely before 7pm. Mostly cloudy, with a low around 22. Calm wind. Chance of precipitation is 60%.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 32. Calm wind becoming southeast 5 to 10 km/h in the afternoon.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 23. Southeast wind 3 to 8 km/h.
Tuesday
A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 32.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 23.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 34.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 23.
Thursday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 33.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 31.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 22.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 32.
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ABOUT THIS FORECAST

 
Point Forecast:
Frontenac MO
 38.62°N 90.4°W (Elev. 597 m)
Last Update:
6:37 pm CDT Jul 12, 2025
Forecast Valid:
8pm CDT Jul 12, 2025-6pm CDT Jul 19, 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