Laplace, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 61 °F (low) to 78.4 °F (high). Annual precipitation averages 66.1 Inches. Laplace is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 44.3 °F | 62.4 °F | 5.8 in. |
| February | 47.6 °F | 66.3 °F | 4.38 in. |
| March | 53.7 °F | 72.5 °F | 4.61 in. |
| April | 59.9 °F | 78.3 °F | 5.04 in. |
| May | 67.8 °F | 84.7 °F | 5.77 in. |
| June | 73.8 °F | 89.5 °F | 7.82 in. |
| July | 75.5 °F | 91.2 °F | 7.55 in. |
| August | 75.2 °F | 91.5 °F | 6.6 in. |
| September | 71.9 °F | 88.1 °F | 5.33 in. |
| October | 62.8 °F | 80.4 °F | 4.14 in. |
| November | 52.8 °F | 70.9 °F | 4.11 in. |
| December | 46.7 °F | 64.7 °F | 4.95 in. |
| Annual | 61 °F | 78.4 °F | 66.1 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 |