Neptune City, New Jersey has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 8 °C (low) to 16.6 °C (high). Annual precipitation averages 1232.4 Millimeters. Neptune City 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 | 4.9 °C | 98.04 mm |
| February | -2.9 °C | 5.9 °C | 74.42 mm |
| March | 0.7 °C | 9.3 °C | 108.71 mm |
| April | 6 °C | 14.8 °C | 100.58 mm |
| May | 11.2 °C | 19.9 °C | 98.04 mm |
| June | 16.6 °C | 25.3 °C | 111.25 mm |
| July | 20.1 °C | 28.3 °C | 106.43 mm |
| August | 19.4 °C | 27.4 °C | 124.46 mm |
| September | 15.9 °C | 24.1 °C | 98.04 mm |
| October | 9.4 °C | 18.4 °C | 107.95 mm |
| November | 3.8 °C | 12.9 °C | 88.65 mm |
| December | -0.6 °C | 8.1 °C | 115.82 mm |
| Annual | 8 °C | 16.6 °C | 1232.39 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |