Harvey Cedars, New Jersey has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.9 °C (low) to 16 °C (high). Annual precipitation averages 1187 Millimeters. Harvey Cedars 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 | -2.4 °C | 5.1 °C | 94.74 mm |
| February | -1.9 °C | 5.7 °C | 77.98 mm |
| March | 1.4 °C | 8.6 °C | 116.84 mm |
| April | 6.7 °C | 13.7 °C | 86.87 mm |
| May | 11.6 °C | 18.5 °C | 87.12 mm |
| June | 17.2 °C | 23.8 °C | 98.3 mm |
| July | 20.6 °C | 27.2 °C | 108.97 mm |
| August | 20.5 °C | 26.7 °C | 120.65 mm |
| September | 17.2 °C | 23.6 °C | 89.92 mm |
| October | 10.6 °C | 18.1 °C | 109.22 mm |
| November | 5.2 °C | 12.7 °C | 85.34 mm |
| December | 0.4 °C | 7.9 °C | 111 mm |
| Annual | 8.9 °C | 16 °C | 1186.95 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 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |