Rockaway, New Jersey has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 42.2 °F (low) to 61.4 °F (high). Annual precipitation averages 51.4 Inches. Rockaway is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.5 °F | 37.0 °F | 3.77 in. |
| February | 21.5 °F | 39.2 °F | 2.98 in. |
| March | 28.9 °F | 47.6 °F | 4.38 in. |
| April | 40.0 °F | 60.4 °F | 3.96 in. |
| May | 49.6 °F | 70.5 °F | 4.0 in. |
| June | 59.3 °F | 79.3 °F | 5.64 in. |
| July | 64.0 °F | 85.2 °F | 4.55 in. |
| August | 62.6 °F | 83.0 °F | 4.76 in. |
| September | 55.1 °F | 76.1 °F | 4.82 in. |
| October | 43.5 °F | 64.0 °F | 4.41 in. |
| November | 34.1 °F | 52.3 °F | 3.61 in. |
| December | 26.7 °F | 41.9 °F | 4.52 in. |
| Annual | 42.2 °F | 61.4 °F | 51.4 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |