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Frontenac, MO Weather Forecast

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Frontenac, MO Weather Forecast

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Frontenac MO weather - Mostly Clear - 82°F
Mostly Clear
82°F
Updated 12:55 pm
Feels Like 90°F
Humidity 69%
Wind ENE 8 mph
Barometer  30.04 in
Dew Point 71°F
Frontenac MO weather - Mostly Clear - 28°C
Mostly Clear
28°C
Updated 12:55 pm
Feels Like 32°C
Humidity 69%
Wind ENE 13 km/h
Barometer  101.7 kPa
Dew Point 22°C
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Frontenac Weather Forecast

THIS AFTERNOON TONIGHT LABOR DAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT
Frontenac, MO Weather - This Afternoon Partly Sunny Frontenac, MO Weather - Tonight Partly Cloudy Frontenac, MO Weather - Labor Day Sunny Frontenac, MO Weather - Monday Night Partly Cloudy Frontenac, MO Weather - Tuesday Sunny Frontenac, MO Weather - Tuesday Night Mostly Clear Frontenac, MO Weather - Wednesday Chance Of T-Storm Frontenac, MO Weather - Wednesday Night Chance Of T-Storm Frontenac, MO Weather - Thursday Chance Of T-Storm Frontenac, MO Weather - Thursday Night Chance Of Showers Frontenac, MO Weather - Friday Chance Of Showers Frontenac, MO Weather - Friday Night Chance Of T-Storm
Partly Sunny Partly Cloudy Sunny Partly Cloudy Sunny Mostly Clear Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of Showers Chance of Showers Chance of T-Storm
Hi: 90°FHi: 32°C
 Lo: 65°FLo: 18°C Hi: 90°FHi: 32°C
 Lo: 65°FLo: 18°C Hi: 95°FHi: 35°C
 Lo: 71°FLo: 22°C Hi: 99°FHi: 37°C
 Lo: 70°FLo: 21°C Hi: 85°FHi: 29°C
 Lo: 65°FLo: 18°C Hi: 85°FHi: 29°C
 Lo: 65°FLo: 18°C
POP: 20% POP: 70% POP: 50% POP: 20% POP: 20% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 1128 AM CDT Sun Sep 06 2026 Frontenac, MO Weather - WeatherWorld.com

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Issued: 1225 PM CDT Sun Sep 6 2026

Key Messages

  • Another day of heat index values around 100 F is forecast for central and southeastern MO, but cooler temperatures and lower humidity will arrive elsewhere today, becoming areawide by Monday.
  • Heat and near-record breaking temperatures will briefly return Tuesday into Wednesday.

Aviation

/18Z TAFS THROUGH 00Z TUESDAY/... Issued at 1222 PM CDT Sun Sep 6 2026

The NW-SE oriented stratus is quickly scattering as low-level dry air is advecting in from the northeast. VFR conditions are expecte...