Gramercy, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 59.3 °F (low) to 78.5 °F (high). Annual precipitation averages 65.6 Inches. Gramercy is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Jan. 1 - Jan. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 43.1 °F | 62.8 °F | 5.78 in. |
| February | 46.4 °F | 66.5 °F | 4.15 in. |
| March | 52.4 °F | 72.7 °F | 4.34 in. |
| April | 57.9 °F | 78.2 °F | 4.93 in. |
| May | 66.1 °F | 84.6 °F | 6.2 in. |
| June | 72.2 °F | 89.5 °F | 7.95 in. |
| July | 74.1 °F | 91.0 °F | 7.15 in. |
| August | 73.6 °F | 91.4 °F | 7.13 in. |
| September | 70.2 °F | 88.2 °F | 5.16 in. |
| October | 60.1 °F | 80.8 °F | 4.1 in. |
| November | 50.0 °F | 71.6 °F | 4.0 in. |
| December | 45.0 °F | 65.1 °F | 4.75 in. |
| Annual | 59.3 °F | 78.5 °F | 65.64 in. |
| Average First Frost Date | Jan. 1 - Jan. 10 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | Frost Rare |
| 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 |