Reserve, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 59.8 °F (low) to 78.6 °F (high). Annual precipitation averages 66.3 Inches. Reserve is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 43.4 °F | 62.9 °F | 5.89 in. |
| February | 46.8 °F | 66.6 °F | 4.32 in. |
| March | 53.0 °F | 72.8 °F | 4.6 in. |
| April | 58.7 °F | 78.4 °F | 5.02 in. |
| May | 66.8 °F | 84.7 °F | 5.81 in. |
| June | 72.5 °F | 89.7 °F | 8.02 in. |
| July | 74.7 °F | 91.1 °F | 7.67 in. |
| August | 74.2 °F | 91.5 °F | 6.44 in. |
| September | 70.8 °F | 88.3 °F | 5.3 in. |
| October | 60.7 °F | 80.9 °F | 4.16 in. |
| November | 50.6 °F | 71.6 °F | 4.11 in. |
| December | 45.4 °F | 65.2 °F | 4.92 in. |
| Annual | 59.8 °F | 78.6 °F | 66.26 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 |