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Mermentau, LA
Full City Profile · Louisiana · Acadia Parish County
3.7
/5.0
B+
Good
570
Population
268/sq mi density
$112,864
Median Income
$27,886 per capita
$55,900
Home Value
$131,294 Zillow
$490
Median Rent
40.7% income on rent
68°F
Avg Temperature
313 sunny days/yr
424
Violent Crime/100K
2,890 property/100K
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.8 / 5.0
$112,864 median income, 2.8% unemployment
A+
Affordability
5.0 / 5.0
$55,900 home value, $490/mo rent
F
Safety
1.0 / 5.0
424 violent crimes/100K (12% above avg)
B+
Education
3.9 / 5.0
36.5% bachelor's degree or higher
Mermentau enjoys a temperate climate with an average annual temperature of 68°F (20°C). Winters average 51°F in January while summers reach 82°F in July. The area gets 313 sunny days per year. Annual precipitation totals 63.5 inches. The area receives 0.1 inches of snow annually. Air quality is rated Good with a median AQI of 42.
Temperature
51°F Jan (11°C)
82°F Jul (28°C)
| Annual Average | 67.8°F |
| 26% above US avg | |
| January Average | 51°F (11°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 313 days/yr |
Geography
| Elevation | 11 ft (3 m) |
| Area | 0.9 sq mi (2.3 km²) |
| Population Density | 268/sq mi |
| Coordinates | 30.1880°N, 92.5838°W |
| Timezone | America/Chicago |
| County | Acadia Parish County |
| Nearest Airport | Chennault International (CWF) 33 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 88.6 / 100 |
| Social Vulnerability | 86.7 / 100 |
| Community Resilience | 30.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Low |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | Relatively High |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 51°F (11°C) | 5.6 in | Coldest |
| February | 54°F (12°C) | 4.0 in | Driest |
| March | 61°F (16°C) | 4.4 in | |
| April | 67°F (20°C) | 4.1 in | |
| May | 75°F (24°C) | 5.6 in | |
| June | 80°F (27°C) | 5.4 in | |
| July | 82°F (28°C) | 5.7 in | Warmest, Wettest |
| August | 82°F (28°C) | 5.2 in | |
| September | 78°F (25°C) | 5.6 in | |
| October | 69°F (20°C) | 4.3 in | |
| November | 60°F (15°C) | 4.8 in | |
| December | 53°F (12°C) | 5.4 in |
Mermentau has a seasonal temperature swing of 31°F / from 51°F in January to 82°F in July. Total annual precipitation is 60.0 inches, with July being the wettest month (5.7") and February the driest (4.0").