Lafitte, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 61.4 °F (low) to 78.3 °F (high). Annual precipitation averages 65.4 Inches. Lafitte is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 44.7 °F | 62.6 °F | 5.55 in. |
| February | 48.1 °F | 66.3 °F | 4.11 in. |
| March | 54.0 °F | 72.2 °F | 4.58 in. |
| April | 60.7 °F | 78.1 °F | 5.01 in. |
| May | 68.1 °F | 84.9 °F | 5.32 in. |
| June | 73.8 °F | 89.4 °F | 7.04 in. |
| July | 75.5 °F | 91.1 °F | 7.66 in. |
| August | 75.5 °F | 90.9 °F | 7.49 in. |
| September | 72.4 °F | 87.7 °F | 6.0 in. |
| October | 63.1 °F | 80.4 °F | 3.92 in. |
| November | 53.0 °F | 71.0 °F | 3.83 in. |
| December | 47.3 °F | 64.8 °F | 4.9 in. |
| Annual | 61.4 °F | 78.3 °F | 65.41 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 |