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Grand Isle, LA
Full City Profile · Louisiana · Jefferson Parish County
1.9
/5.0
D
Poor
644
Population
101/sq mi density
$266,100
Home Value
$255,314 Zillow
$1,118
Median Rent
18.7% income on rent
69°F
Avg Temperature
317 sunny days/yr
194
Violent Crime/100K
48 property/100K
D
Overall
1.9 / 5.0
Below average overall score based on economy, affordability, safety and education
F
Safety
1.0 / 5.0
194 violent crimes/100K
C+
Education
2.9 / 5.0
23.7% bachelor's degree or higher
Grand Isle enjoys a temperate climate with an average annual temperature of 69°F (21°C). Winters average 54°F in January while summers reach 82°F in July. The area gets 317 sunny days per year. Annual precipitation totals 66.7 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)
82°F Jul (28°C)
| Annual Average | 69.4°F |
| 29% above US avg | |
| January Average | 54°F (12°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 317 days/yr |
Geography
| Elevation | 2 ft (1 m) |
| Area | 8.2 sq mi (21.2 km²) |
| Population Density | 101/sq mi |
| Coordinates | 29.2129°N, 90.0291°W |
| Timezone | America/Chicago |
| County | Jefferson Parish County |
| Nearest Airport | Louis Armstrong New Orleans International (MSY) 56 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0448 ppm |
| NO₂ (Nitrogen Dioxide) | 10.1 ppb |
| PM2.5 (Fine Particles) | 8.4 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 98.7 / 100 |
| Social Vulnerability | 68.4 / 100 |
| Community Resilience | 97.7 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very High |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively High |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively High |
| Winter Weather | Relatively High |
| Lightning | Very High |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Relatively High |
| 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) | 4.7 in | Coldest |
| February | 57°F (14°C) | 4.5 in | |
| March | 63°F (17°C) | 4.5 in | |
| April | 69°F (20°C) | 3.8 in | |
| May | 75°F (24°C) | 4.9 in | |
| June | 80°F (27°C) | 4.9 in | |
| July | 82°F (28°C) | 7.1 in | Warmest, Wettest |
| August | 82°F (28°C) | 7.0 in | |
| September | 80°F (27°C) | 6.3 in | |
| October | 72°F (22°C) | 3.4 in | Driest |
| November | 64°F (18°C) | 4.2 in | |
| December | 58°F (14°C) | 4.9 in |
Grand Isle has a seasonal temperature swing of 29°F / from 54°F in January to 82°F in July. Total annual precipitation is 60.2 inches, with July being the wettest month (7.1") and October the driest (3.4").