Diamond Beach, New Jersey has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.5 °C (low) to 17.1 °C (high). Annual precipitation averages 1127.5 Millimeters. Diamond Beach is located in USDA Plant Hardiness Zone 8a. 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 | -1.6 °C | 5.9 °C | 82.8 mm |
| February | -1.3 °C | 6.5 °C | 70.1 mm |
| March | 2.2 °C | 9.9 °C | 109.22 mm |
| April | 7.5 °C | 15.1 °C | 87.88 mm |
| May | 12.6 °C | 20.4 °C | 91.19 mm |
| June | 17.9 °C | 25.4 °C | 89.92 mm |
| July | 20.8 °C | 28.3 °C | 107.44 mm |
| August | 20.4 °C | 27.7 °C | 106.93 mm |
| September | 17.4 °C | 24.8 °C | 83.82 mm |
| October | 11.6 °C | 19.1 °C | 109.47 mm |
| November | 5.7 °C | 13.4 °C | 83.82 mm |
| December | 1.3 °C | 8.7 °C | 104.9 mm |
| Annual | 9.5 °C | 17.1 °C | 1127.49 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 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |