Port Norris, New Jersey has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.7 °C (low) to 17.5 °C (high). Annual precipitation averages 1146.6 Millimeters. Port Norris is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.7 °C | 5.4 °C | 83.57 mm |
| February | -2.5 °C | 6.3 °C | 75.18 mm |
| March | 1.2 °C | 10.3 °C | 107.7 mm |
| April | 6.8 °C | 16.6 °C | 87.12 mm |
| May | 11.9 °C | 21.6 °C | 90.93 mm |
| June | 17.3 °C | 26.8 °C | 99.82 mm |
| July | 20.5 °C | 29.2 °C | 112.52 mm |
| August | 19.6 °C | 28.3 °C | 114.3 mm |
| September | 16.6 °C | 25.1 °C | 96.01 mm |
| October | 10.4 °C | 19.2 °C | 99.06 mm |
| November | 4.7 °C | 13.2 °C | 78.74 mm |
| December | 0.3 °C | 8.1 °C | 101.6 mm |
| Annual | 8.7 °C | 17.5 °C | 1146.55 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |