New Vernon, New Jersey has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.3 °F (low) to 62.2 °F (high). Annual precipitation averages 50.4 Inches. New Vernon is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.0 °F | 38.0 °F | 3.79 in. |
| February | 22.2 °F | 40.6 °F | 2.94 in. |
| March | 29.4 °F | 49.0 °F | 4.4 in. |
| April | 40.1 °F | 61.4 °F | 4.08 in. |
| May | 49.8 °F | 71.3 °F | 4.12 in. |
| June | 59.2 °F | 80.0 °F | 4.88 in. |
| July | 64.0 °F | 85.1 °F | 4.73 in. |
| August | 62.4 °F | 83.2 °F | 4.66 in. |
| September | 55.1 °F | 76.5 °F | 4.34 in. |
| October | 43.4 °F | 64.5 °F | 4.43 in. |
| November | 33.9 °F | 53.2 °F | 3.63 in. |
| December | 26.8 °F | 43.0 °F | 4.43 in. |
| Annual | 42.3 °F | 62.2 °F | 50.43 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |