Allenwood, New Jersey has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.4 °C (low) to 16.8 °C (high). Annual precipitation averages 1245.4 Millimeters. Allenwood 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 | -4.3 °C | 4.7 °C | 99.06 mm |
| February | -3.5 °C | 5.9 °C | 75.95 mm |
| March | 0.3 °C | 9.5 °C | 109.98 mm |
| April | 5.7 °C | 15.4 °C | 99.82 mm |
| May | 10.9 °C | 20.6 °C | 93.98 mm |
| June | 16.1 °C | 25.9 °C | 117.86 mm |
| July | 19.4 °C | 28.6 °C | 109.73 mm |
| August | 18.6 °C | 27.8 °C | 114.55 mm |
| September | 15.1 °C | 24.4 °C | 99.57 mm |
| October | 8.6 °C | 18.4 °C | 111 mm |
| November | 2.8 °C | 12.9 °C | 93.73 mm |
| December | -1.4 °C | 7.8 °C | 120.14 mm |
| Annual | 7.4 °C | 16.8 °C | 1245.37 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |