Brookside, New Jersey has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.8 °F (low) to 61.7 °F (high). Annual precipitation averages 51 Inches. Brookside is located in USDA Plant Hardiness Zone 7a. 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 | 37.7 °F | 3.81 in. |
| February | 21.6 °F | 40.1 °F | 2.95 in. |
| March | 28.9 °F | 48.4 °F | 4.34 in. |
| April | 39.7 °F | 61.0 °F | 4.07 in. |
| May | 49.4 °F | 70.9 °F | 4.15 in. |
| June | 58.7 °F | 79.5 °F | 5.1 in. |
| July | 63.6 °F | 84.7 °F | 4.71 in. |
| August | 62.1 °F | 82.8 °F | 4.66 in. |
| September | 54.6 °F | 76.0 °F | 4.63 in. |
| October | 42.9 °F | 64.1 °F | 4.45 in. |
| November | 33.5 °F | 52.8 °F | 3.63 in. |
| December | 26.4 °F | 42.6 °F | 4.53 in. |
| Annual | 41.8 °F | 61.7 °F | 51.03 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |