Seaville, New Jersey has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.3 °C (low) to 17.6 °C (high). Annual precipitation averages 1206 Millimeters. Seaville 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.2 °C | 5.9 °C | 85.85 mm |
| February | -2.6 °C | 6.6 °C | 81.28 mm |
| March | 1 °C | 10.3 °C | 118.36 mm |
| April | 6.6 °C | 16.2 °C | 91.95 mm |
| May | 11.7 °C | 21.3 °C | 89.41 mm |
| June | 17.2 °C | 26.5 °C | 95.25 mm |
| July | 20.2 °C | 29.2 °C | 118.11 mm |
| August | 19.4 °C | 28.4 °C | 112.27 mm |
| September | 16.2 °C | 25.3 °C | 99.31 mm |
| October | 9.7 °C | 19.5 °C | 112.01 mm |
| November | 4.1 °C | 13.6 °C | 88.39 mm |
| December | -0.2 °C | 8.6 °C | 113.79 mm |
| Annual | 8.3 °C | 17.6 °C | 1205.98 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| 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 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |