Vernon Valley, New Jersey has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.3 °C (low) to 16 °C (high). Annual precipitation averages 1202.2 Millimeters. Vernon Valley is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.9 °C | 2.1 °C | 83.82 mm |
| February | -7 °C | 3.9 °C | 68.07 mm |
| March | -2.8 °C | 8.4 °C | 102.36 mm |
| April | 3.1 °C | 15.7 °C | 96.01 mm |
| May | 8.7 °C | 21.7 °C | 92.2 mm |
| June | 13.8 °C | 26.2 °C | 119.63 mm |
| July | 16.4 °C | 28.9 °C | 106.68 mm |
| August | 15.6 °C | 27.8 °C | 119.63 mm |
| September | 11.4 °C | 24.2 °C | 113.28 mm |
| October | 5.2 °C | 17.5 °C | 109.73 mm |
| November | -0.2 °C | 10.9 °C | 88.14 mm |
| December | -4.4 °C | 4.9 °C | 102.62 mm |
| Annual | 4.3 °C | 16 °C | 1202.17 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |