Pine Brook, New Jersey has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.2 °C (low) to 17.1 °C (high). Annual precipitation averages 1246.4 Millimeters. Pine Brook is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.6 °C | 3.6 °C | 93.73 mm |
| February | -4.9 °C | 5.1 °C | 70.36 mm |
| March | -0.9 °C | 9.7 °C | 106.43 mm |
| April | 4.9 °C | 16.5 °C | 103.12 mm |
| May | 10.4 °C | 22.2 °C | 101.85 mm |
| June | 15.6 °C | 27.1 °C | 122.17 mm |
| July | 18.5 °C | 29.9 °C | 109.98 mm |
| August | 17.4 °C | 28.8 °C | 116.33 mm |
| September | 13.3 °C | 25.1 °C | 108.97 mm |
| October | 6.8 °C | 18.4 °C | 112.52 mm |
| November | 1.6 °C | 12.1 °C | 91.44 mm |
| December | -2.4 °C | 6.4 °C | 109.47 mm |
| Annual | 6.2 °C | 17.1 °C | 1246.37 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |