Lafitte, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 16.3 °C (low) to 25.7 °C (high). Annual precipitation averages 1661.4 Millimeters. Lafitte is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.1 °C | 17 °C | 140.97 mm |
| February | 8.9 °C | 19.1 °C | 104.39 mm |
| March | 12.2 °C | 22.3 °C | 116.33 mm |
| April | 15.9 °C | 25.6 °C | 127.25 mm |
| May | 20.1 °C | 29.4 °C | 135.13 mm |
| June | 23.2 °C | 31.9 °C | 178.82 mm |
| July | 24.2 °C | 32.8 °C | 194.56 mm |
| August | 24.2 °C | 32.7 °C | 190.25 mm |
| September | 22.4 °C | 30.9 °C | 152.4 mm |
| October | 17.3 °C | 26.9 °C | 99.57 mm |
| November | 11.7 °C | 21.7 °C | 97.28 mm |
| December | 8.5 °C | 18.2 °C | 124.46 mm |
| Annual | 16.3 °C | 25.7 °C | 1661.41 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |