Elmer, New Jersey has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.7 °F (low) to 64.8 °F (high). Annual precipitation averages 47.7 Inches. Elmer 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 | 24.9 °F | 41.6 °F | 3.7 in. |
| February | 26.3 °F | 44.1 °F | 2.98 in. |
| March | 32.9 °F | 51.9 °F | 4.47 in. |
| April | 43.0 °F | 64.1 °F | 3.58 in. |
| May | 52.6 °F | 73.6 °F | 3.65 in. |
| June | 62.1 °F | 82.6 °F | 4.39 in. |
| July | 67.6 °F | 86.9 °F | 4.83 in. |
| August | 65.7 °F | 84.7 °F | 4.69 in. |
| September | 58.9 °F | 78.8 °F | 4.13 in. |
| October | 47.0 °F | 67.1 °F | 3.94 in. |
| November | 37.1 °F | 56.1 °F | 3.1 in. |
| December | 29.9 °F | 46.4 °F | 4.22 in. |
| Annual | 45.7 °F | 64.8 °F | 47.68 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 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |