Oldwick, New Jersey has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.3 °C (low) to 16.9 °C (high). Annual precipitation averages 1274.6 Millimeters. Oldwick 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 | -6.4 °C | 3.6 °C | 90.93 mm |
| February | -5.7 °C | 5.1 °C | 71.12 mm |
| March | -1.7 °C | 9.7 °C | 109.47 mm |
| April | 4 °C | 16.7 °C | 105.41 mm |
| May | 9.5 °C | 21.9 °C | 114.3 mm |
| June | 14.6 °C | 26.6 °C | 117.6 mm |
| July | 17.4 °C | 29.3 °C | 119.13 mm |
| August | 16.6 °C | 28.2 °C | 114.55 mm |
| September | 12.4 °C | 24.6 °C | 114.55 mm |
| October | 6.1 °C | 18.1 °C | 111.51 mm |
| November | 0.4 °C | 12.1 °C | 88.14 mm |
| December | -3.3 °C | 6.3 °C | 117.86 mm |
| Annual | 5.3 °C | 16.9 °C | 1274.57 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |