Gramercy, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 15.1 °C (low) to 25.9 °C (high). Annual precipitation averages 1667.3 Millimeters. 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 | 6.2 °C | 17.1 °C | 146.81 mm |
| February | 8 °C | 19.2 °C | 105.41 mm |
| March | 11.3 °C | 22.6 °C | 110.24 mm |
| April | 14.4 °C | 25.7 °C | 125.22 mm |
| May | 18.9 °C | 29.2 °C | 157.48 mm |
| June | 22.3 °C | 31.9 °C | 201.93 mm |
| July | 23.4 °C | 32.8 °C | 181.61 mm |
| August | 23.1 °C | 33 °C | 181.1 mm |
| September | 21.2 °C | 31.2 °C | 131.06 mm |
| October | 15.6 °C | 27.1 °C | 104.14 mm |
| November | 10 °C | 22 °C | 101.6 mm |
| December | 7.2 °C | 18.4 °C | 120.65 mm |
| Annual | 15.1 °C | 25.9 °C | 1667.25 mm |
| 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 : -6.7°C to -3.9°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 |