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Weather & Climate
Grand Isle, Louisiana, United States
Overview
Climate data and monthly weather averages for Grand Isle.
Key Metrics
Annual Avg
22.9°C
Summer Avg
28.8°C
Winter Avg
16.4°C
Record High
32.7°C
Record Low
1.5°C
Annual Precipitation
1590.5 mm
Avg Humidity
78%
Summer Humidity
76%
Winter Humidity
81%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 22.7° | 15.5° | 1.5° | 101.7 | 80% | 92 | 70.6 |
| Feb | 24.2° | 16.6° | 5.1° | 101.4 | 82% | 101 | 56.1 |
| Mar | 25.4° | 18.9° | 5.8° | 105.7 | 81% | 149 | 56 |
| Apr | 26.6° | 21.9° | 10.6° | 105.6 | 80% | 171 | 53.1 |
| May | 29.8° | 25.2° | 14.9° | 109.4 | 78% | 198 | 48.9 |
| Jun | 31.3° | 28.1° | 23.3° | 161.7 | 77% | 185 | 66.5 |
| Jul | 32.6° | 29° | 26.2° | 199.6 | 75% | 176 | 83.3 |
| Aug | 32.7° | 29.3° | 24.5° | 228.8 | 75% | 166 | 114.3 |
| Sep | 32.1° | 28° | 21.7° | 156.6 | 75% | 151 | 95.9 |
| Oct | 29.9° | 24.7° | 13.6° | 114.4 | 74% | 137 | 81.1 |
| Nov | 27.1° | 20.3° | 8.8° | 81.3 | 77% | 104 | 68.9 |
| Dec | 23.5° | 17.2° | 6.5° | 124.3 | 81% | 83 | 58.2 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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