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Hahnville, LA
Full City Profile · Louisiana · St. Charles Parish County
3.2
/5.0
B
Good
3,826
Population
688/sq mi density
$72,361
Median Income
$34,416 per capita
$226,300
Home Value
$268,165 Zillow
$676
Median Rent
24.6% income on rent
71°F
Avg Temperature
317 sunny days/yr
236
Violent Crime/100K
3,608 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.4 / 5.0
$72,361 median income, 0.4% unemployment
A+
Affordability
4.9 / 5.0
$226,300 home value, $676/mo rent
F
Safety
1.0 / 5.0
236 violent crimes/100K
C
Education
2.4 / 5.0
17.2% bachelor's degree or higher
Hahnville has a warm climate with an average annual temperature of 71°F (22°C). Winters average 54°F in January while summers reach 84°F in July. The area gets 317 sunny days per year. Annual precipitation totals 63.4 inches. The area receives 0.0 inches of snow annually. Air quality is rated Good with a median AQI of 42.
Temperature
54°F Jan (12°C)
84°F Jul (29°C)
| Annual Average | 70.5°F |
| 31% above US avg | |
| January Average | 54°F (12°C) |
| July Average | 84°F (29°C) |
| Sunny Days | 317 days/yr |
Geography
| Elevation | 1 ft (0 m) |
| Area | 6.5 sq mi (16.9 km²) |
| Population Density | 688/sq mi |
| Coordinates | 29.9613°N, 90.4240°W |
| Timezone | America/Chicago |
| County | St. Charles Parish County |
| Nearest Airport | Louis Armstrong New Orleans International (MSY) 10 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 85.1 / 100 |
| Social Vulnerability | 41.7 / 100 |
| Community Resilience | 100.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Very Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | Very High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 54°F (12°C) | 5.4 in | Coldest |
| February | 55°F (13°C) | 5.6 in | |
| March | 62°F (16°C) | 5.2 in | |
| April | 68°F (20°C) | 4.6 in | |
| May | 75°F (24°C) | 5.2 in | |
| June | 80°F (27°C) | 5.6 in | |
| July | 84°F (29°C) | 6.9 in | Warmest, Wettest |
| August | 82°F (28°C) | 6.4 in | |
| September | 78°F (26°C) | 5.9 in | |
| October | 69°F (21°C) | 3.4 in | Driest |
| November | 61°F (16°C) | 4.6 in | |
| December | 55°F (13°C) | 5.3 in |
Hahnville has a seasonal temperature swing of 30°F / from 54°F in January to 84°F in July. Total annual precipitation is 64.0 inches, with July being the wettest month (6.9") and October the driest (3.4").