Haddonfield, New Jersey has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 47.4 °F (low) to 65.1 °F (high). Annual precipitation averages 47.3 Inches. Haddonfield 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 | 26.5 °F | 41.6 °F | 3.56 in. |
| February | 27.8 °F | 44.7 °F | 2.79 in. |
| March | 34.6 °F | 52.8 °F | 4.48 in. |
| April | 44.6 °F | 64.6 °F | 3.51 in. |
| May | 54.2 °F | 74.1 °F | 3.89 in. |
| June | 63.6 °F | 83.2 °F | 4.25 in. |
| July | 69.2 °F | 87.6 °F | 4.73 in. |
| August | 67.4 °F | 85.4 °F | 4.9 in. |
| September | 60.8 °F | 78.7 °F | 4.04 in. |
| October | 49.1 °F | 66.8 °F | 3.84 in. |
| November | 39.1 °F | 55.9 °F | 3.1 in. |
| December | 31.7 °F | 46.3 °F | 4.2 in. |
| Annual | 47.4 °F | 65.1 °F | 47.29 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |