Roosevelt, New Jersey has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.8 °C (low) to 17.7 °C (high). Annual precipitation averages 1212.3 Millimeters. Roosevelt 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.7 °C | 4.8 °C | 90.93 mm |
| February | -3.8 °C | 6.2 °C | 68.07 mm |
| March | 0 °C | 10.4 °C | 110.24 mm |
| April | 5.4 °C | 17 °C | 93.47 mm |
| May | 10.8 °C | 22.4 °C | 98.81 mm |
| June | 15.8 °C | 27.5 °C | 115.82 mm |
| July | 18.9 °C | 30.1 °C | 121.41 mm |
| August | 17.9 °C | 29.1 °C | 116.84 mm |
| September | 13.9 °C | 25.5 °C | 104.9 mm |
| October | 7.6 °C | 19 °C | 98.3 mm |
| November | 2.1 °C | 13.2 °C | 83.82 mm |
| December | -2 °C | 7.6 °C | 109.73 mm |
| Annual | 6.8 °C | 17.7 °C | 1212.34 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |