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.

Light Drizzle Fog/Mist

39°F

4°C

Humidity 93%
Wind Speed E 7 mph
Barometer 30.14 in (1021.5 mb)
Dewpoint 37°F (3°C)
Visibility 3.00 mi
Wind Chill34°F (1°C)
Last update 2 Mar 11:51 pm CST
Extended Forecast for

Frontenac MO

  • Overnight

    Overnight: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 3am. Patchy fog before 1am, then patchy fog after 3am. Low around 39. East wind 3 to 5 mph. Chance of precipitation is 90%.

    Low: 39 °F

    Rain and
    Patchy Fog

  • Tuesday

    Tuesday: Rain and thunderstorms before 3pm, then rain and possibly a thunderstorm, mainly after 3pm. Patchy fog between 8am and noon. High near 59. East wind 3 to 5 mph. Chance of precipitation is 90%.

    High: 59 °F

    Rain and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Rain and thunderstorms before 3am, then rain and possibly a thunderstorm, mainly after 3am. Patchy fog between 10pm and 3am. Low around 49. East wind 5 to 7 mph. Chance of precipitation is 90%.

    Low: 49 °F

    Rain and
    Patchy Fog

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. High near 64. Light and variable wind becoming south around 6 mph in the morning. Chance of precipitation is 100%.

    High: 64 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 56. South wind around 6 mph. Chance of precipitation is 90%.

    Low: 56 °F

    Rain

  • Thursday

    Thursday: Rain and possibly a thunderstorm before 9am, then rain between 9am and noon, then a chance of rain and thunderstorms after noon. High near 71. Chance of precipitation is 80%.

    High: 71 °F

    Rain then
    Chance Rain

  • Thursday Night

    Thursday Night: A chance of rain, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 56. Chance of precipitation is 50%.

    Low: 56 °F

    Chance Rain
    then Chance
    T-storms

  • Friday

    Friday: A chance of rain and thunderstorms. Partly sunny, with a high near 80. Chance of precipitation is 50%.

    High: 80 °F

    Chance
    T-storms then
    Chance Rain

  • Friday Night

    Friday Night: A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.

    Low: 60 °F

    Chance
    T-storms then
    Rain Likely

Detailed Forecast

Overnight
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 3am. Patchy fog before 1am, then patchy fog after 3am. Low around 39. East wind 3 to 5 mph. Chance of precipitation is 90%.
Tuesday
Rain and thunderstorms before 3pm, then rain and possibly a thunderstorm, mainly after 3pm. Patchy fog between 8am and noon. High near 59. East wind 3 to 5 mph. Chance of precipitation is 90%.
Tuesday Night
Rain and thunderstorms before 3am, then rain and possibly a thunderstorm, mainly after 3am. Patchy fog between 10pm and 3am. Low around 49. East wind 5 to 7 mph. Chance of precipitation is 90%.
Wednesday
Rain and possibly a thunderstorm. High near 64. Light and variable wind becoming south around 6 mph in the morning. Chance of precipitation is 100%.
Wednesday Night
Rain and possibly a thunderstorm. Low around 56. South wind around 6 mph. Chance of precipitation is 90%.
Thursday
Rain and possibly a thunderstorm before 9am, then rain between 9am and noon, then a chance of rain and thunderstorms after noon. High near 71. Chance of precipitation is 80%.
Thursday Night
A chance of rain, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 56. Chance of precipitation is 50%.
Friday
A chance of rain and thunderstorms. Partly sunny, with a high near 80. Chance of precipitation is 50%.
Friday Night
A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.
Saturday
Rain likely and possibly a thunderstorm before noon, then a chance of rain and thunderstorms after noon. Cloudy, with a high near 70. Chance of precipitation is 70%.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 48.
Sunday
A 20 percent chance of rain. Partly sunny, with a high near 66.
Sunday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 50.
Monday
A 30 percent chance of rain. Sunny, with a high near 72.
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ABOUT THIS FORECAST

 
Point Forecast:
Frontenac MO
 38.62°N 90.4°W (Elev. 597 ft)
Last Update:
10:30 pm CST Mar 2, 2026
Forecast Valid:
12am CST Mar 3, 2026-6pm CDT Mar 9, 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