Palmyra, New Jersey has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.8 °F (low) to 64.9 °F (high). Annual precipitation averages 47.6 Inches. Palmyra is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.8 °F | 41.6 °F | 3.54 in. |
| February | 28.2 °F | 44.4 °F | 2.8 in. |
| March | 34.9 °F | 52.2 °F | 4.43 in. |
| April | 44.9 °F | 64.0 °F | 3.59 in. |
| May | 54.6 °F | 73.3 °F | 3.94 in. |
| June | 64.3 °F | 82.6 °F | 4.27 in. |
| July | 69.7 °F | 87.1 °F | 4.69 in. |
| August | 68.3 °F | 85.5 °F | 4.87 in. |
| September | 61.0 °F | 79.1 °F | 4.16 in. |
| October | 49.4 °F | 67.0 °F | 3.85 in. |
| November | 39.3 °F | 56.2 °F | 3.13 in. |
| December | 31.9 °F | 46.3 °F | 4.29 in. |
| Annual | 47.8 °F | 64.9 °F | 47.56 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |