Pennsville, New Jersey has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 8.1 °C (low) to 17.6 °C (high). Annual precipitation averages 1182.1 Millimeters. Pennsville 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 | -3.7 °C | 4.7 °C | 87.63 mm |
| February | -3.1 °C | 6.1 °C | 74.17 mm |
| March | 0.8 °C | 10.4 °C | 108.2 mm |
| April | 6.7 °C | 17.1 °C | 92.46 mm |
| May | 12.2 °C | 22.3 °C | 94.23 mm |
| June | 17.4 °C | 27.3 °C | 115.57 mm |
| July | 20.4 °C | 29.7 °C | 116.33 mm |
| August | 19.5 °C | 28.8 °C | 106.68 mm |
| September | 15.7 °C | 25.4 °C | 106.68 mm |
| October | 8.9 °C | 19 °C | 98.3 mm |
| November | 3.1 °C | 12.9 °C | 77.98 mm |
| December | -1 °C | 7.5 °C | 103.89 mm |
| Annual | 8.1 °C | 17.6 °C | 1182.12 mm |
| 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 : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |