Mermentau, Louisiana Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Mermentau weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast52%—93°77°—
- MondayJul 6Light Drizzle42%0.02″91°75°-2°
- TuesdayJul 7T-storm w/ Hail68%—90°74°-1°
- WednesdayJul 8Light Showers25%—94°74°+4°
- ThursdayJul 9Light Drizzle17%—93°76°-1°
- FridayJul 10Partly Cloudy15%—94°76°+1°
- SaturdayJul 11Thunderstorm37%—93°76°-1°
AQI 44 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 6.3 µg/m³ (AQI 35) with a 0.78 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 6.3 µg/m³ (AQI 35) with a 0.78 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.78
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:23 PM
- Moonset
- 11:26 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Mermentau at a glance
- Today vs. normal: 82°F — typical for the season
- Last frost: February 16 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 70556
16-Day Forecast — Mermentau
- Sun93°77°52%
- Mon91°75°42%
- Tue90°74°68%
- Wed94°74°25%
- Thu93°76°17%
- Fri94°76°15%
- Sat93°76°37%
- Sun83°73°55%
- Mon85°73°57%
- Tue91°74°35%
- Wed93°75°28%
- Thu93°76°46%
- Fri93°76°42%
- Sat95°80°39%
- Sun92°78°43%
- Mon92°76°47%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Mermentau
SPC includes Mermentau in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Mermentau
- 70556
- 70559