Jean Lafitte, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 60.7 °F (low) to 78.4 °F (high). Annual precipitation averages 65.5 Inches. Jean Lafitte is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 44.2 °F | 62.6 °F | 5.61 in. |
| February | 47.6 °F | 66.4 °F | 4.09 in. |
| March | 53.5 °F | 72.3 °F | 4.7 in. |
| April | 59.9 °F | 78.3 °F | 4.99 in. |
| May | 67.4 °F | 85.1 °F | 5.45 in. |
| June | 73.2 °F | 89.7 °F | 7.02 in. |
| July | 74.9 °F | 91.3 °F | 7.71 in. |
| August | 74.8 °F | 91.1 °F | 7.26 in. |
| September | 71.6 °F | 87.7 °F | 6.05 in. |
| October | 62.3 °F | 80.4 °F | 3.61 in. |
| November | 52.0 °F | 71.1 °F | 3.92 in. |
| December | 46.6 °F | 64.9 °F | 5.12 in. |
| Annual | 60.7 °F | 78.4 °F | 65.53 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |