Hawthorne, New Jersey has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.9 °F (low) to 62.8 °F (high). Annual precipitation averages 49.2 Inches. Hawthorne is located in USDA Plant Hardiness Zone 7a. 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 | 22.2 °F | 38.6 °F | 3.57 in. |
| February | 23.9 °F | 41.4 °F | 2.75 in. |
| March | 31.1 °F | 49.4 °F | 4.27 in. |
| April | 41.6 °F | 61.8 °F | 4.04 in. |
| May | 51.3 °F | 71.9 °F | 4.0 in. |
| June | 60.8 °F | 80.9 °F | 4.87 in. |
| July | 66.0 °F | 85.9 °F | 4.39 in. |
| August | 64.2 °F | 83.9 °F | 4.58 in. |
| September | 56.7 °F | 77.1 °F | 4.35 in. |
| October | 44.8 °F | 65.3 °F | 4.37 in. |
| November | 35.4 °F | 54.0 °F | 3.71 in. |
| December | 28.2 °F | 43.7 °F | 4.28 in. |
| Annual | 43.9 °F | 62.8 °F | 49.18 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 7a : 0°F to 5°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 |