Frontenac, MO Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Frontenac, MO in one place.
Sunny, with a high near 99. Heat index values as high as 111. Southwest wind 5 to 9 mph.
Local Weather Overview
This forecast page for Frontenac, MO is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 26, 2026 9:47 AM CDT.
The active forecast window currently covers Jul 27 to Aug 1, 2026 for Frontenac, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 27 to Aug 1, 2026
- Latest sync
- Jul 26, 2026 9:47 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Frontenac
Monday looks like the warmest upcoming period in Frontenac at 99 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 69 degrees F.
The strongest winds are forecast for Monday at about 5 to 9 mph SW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 26, 2026 9:47 AM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 79. Heat index values as high as 109. West wind around 8 mph.
Mostly sunny, with a high near 94. Northwest wind around 8 mph.
Partly cloudy, with a low around 73.
Sunny, with a high near 90.
Mostly clear, with a low around 69.
Sunny, with a high near 90.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 69. Chance of precipitation is 30%.
A chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 69. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Jul 27
|
Sunny
|
99°F |
5 to 9 mph
SW
|
|
Monday Night
Jul 27
|
Mostly Clear
|
79°F |
8 mph
W
|
|
Tuesday
Jul 28
|
Mostly Sunny
|
94°F |
8 mph
NW
|
|
Tuesday Night
Jul 28
|
Partly Cloudy
|
73°F |
3 to 7 mph
NE
|
|
Wednesday
Jul 29
|
Sunny
|
90°F |
3 to 7 mph
NE
|
|
Wednesday Night
Jul 29
|
Mostly Clear
|
69°F |
2 to 7 mph
E
|
|
Thursday
Jul 30
|
Sunny
|
90°F |
2 to 6 mph
SE
|
|
Thursday Night
Jul 30
|
Partly Cloudy then Slight Chance Rain Showers
|
71°F |
2 to 6 mph
SE
|
|
Friday
Jul 31
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
86°F |
6 mph
S
|
|
Friday Night
Jul 31
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
69°F |
3 to 7 mph
NE
|
|
Saturday
Aug 1
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
86°F |
5 to 8 mph
N
|
|
Saturday Night
Aug 1
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
69°F |
2 to 8 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Frontenac.
