Gloucester, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14 °C (low) to 21.4 °C (high). Annual precipitation averages 1585.2 Millimeters. Gloucester is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.6 °C | 12.4 °C | 116.59 mm |
| February | 4.4 °C | 13.3 °C | 106.17 mm |
| March | 7.7 °C | 16.4 °C | 97.79 mm |
| April | 12.7 °C | 20.4 °C | 104.65 mm |
| May | 17.4 °C | 24.4 °C | 111.51 mm |
| June | 21.9 °C | 28 °C | 113.54 mm |
| July | 23.9 °C | 29.7 °C | 159 mm |
| August | 23.3 °C | 29.4 °C | 202.69 mm |
| September | 21.1 °C | 27.5 °C | 213.11 mm |
| October | 15.7 °C | 23.2 °C | 127.25 mm |
| November | 9.9 °C | 18.2 °C | 120.4 mm |
| December | 5.9 °C | 14.3 °C | 112.52 mm |
| Annual | 14 °C | 21.4 °C | 1585.22 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |