Gibbstown, New Jersey has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.2 °C (low) to 18.1 °C (high). Annual precipitation averages 1178.1 Millimeters. Gibbstown is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.6 °C | 5.2 °C | 90.68 mm |
| February | -1.9 °C | 6.5 °C | 72.39 mm |
| March | 1.8 °C | 10.8 °C | 110.49 mm |
| April | 7.6 °C | 17.5 °C | 90.17 mm |
| May | 13 °C | 22.8 °C | 93.22 mm |
| June | 18.3 °C | 27.9 °C | 108.2 mm |
| July | 21.2 °C | 30.3 °C | 116.08 mm |
| August | 20.5 °C | 29.4 °C | 115.32 mm |
| September | 16.7 °C | 25.8 °C | 105.16 mm |
| October | 10.3 °C | 19.2 °C | 96.52 mm |
| November | 4.6 °C | 13.3 °C | 75.95 mm |
| December | 0.4 °C | 7.9 °C | 103.89 mm |
| Annual | 9.2 °C | 18.1 °C | 1178.07 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |