Leonville, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 58 °F (low) to 78.5 °F (high). Annual precipitation averages 64.4 Inches. Leonville is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 41.5 °F | 61.9 °F | 6.78 in. |
| February | 44.9 °F | 65.6 °F | 4.77 in. |
| March | 51.1 °F | 72.4 °F | 4.26 in. |
| April | 57.3 °F | 78.7 °F | 5.03 in. |
| May | 65.6 °F | 85.1 °F | 5.83 in. |
| June | 71.6 °F | 90.0 °F | 6.53 in. |
| July | 73.5 °F | 91.5 °F | 5.41 in. |
| August | 72.8 °F | 92.2 °F | 5.55 in. |
| September | 68.3 °F | 88.4 °F | 5.26 in. |
| October | 58.0 °F | 81.1 °F | 5.01 in. |
| November | 48.4 °F | 71.1 °F | 4.96 in. |
| December | 43.4 °F | 63.9 °F | 5.05 in. |
| Annual | 58 °F | 78.5 °F | 64.44 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |