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

48°F

9°C

Humidity 50%
Wind Speed W 5 mph
Barometer 30.20 in (1023.0 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 18 Apr 10:51 pm CDT
Extended Forecast for

Frontenac MO

  • Tonight

    Tonight: Mostly clear, with a low around 41. West wind 3 to 6 mph.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 68. West wind 6 to 14 mph, with gusts as high as 28 mph.

    High: 68 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43. North wind 5 to 7 mph becoming light and variable after midnight.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 69. Light and variable wind becoming southeast 5 to 7 mph in the morning.

    High: 69 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52. Southeast wind around 7 mph.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 41. West wind 3 to 6 mph.
Sunday
Sunny, with a high near 68. West wind 6 to 14 mph, with gusts as high as 28 mph.
Sunday Night
Mostly clear, with a low around 43. North wind 5 to 7 mph becoming light and variable after midnight.
Monday
Sunny, with a high near 69. Light and variable wind becoming southeast 5 to 7 mph in the morning.
Monday Night
Mostly clear, with a low around 52. Southeast wind around 7 mph.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 58.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 62.
Thursday
Mostly sunny, with a high near 84.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 63.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 75. Chance of precipitation is 70%.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 50.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 69.
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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:
10:46 pm CDT Apr 18, 2026
Forecast Valid:
11pm CDT Apr 18, 2026-6pm CDT Apr 25, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation