Plymouth, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.3 °F (low) to 71.8 °F (high). Annual precipitation averages 53.1 Inches. Plymouth is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 32.4 °F | 52.6 °F | 3.84 in. |
| February | 34.2 °F | 55.7 °F | 3.31 in. |
| March | 40.2 °F | 62.6 °F | 4.08 in. |
| April | 49.6 °F | 72.2 °F | 3.65 in. |
| May | 58.6 °F | 79.2 °F | 4.05 in. |
| June | 66.8 °F | 86.1 °F | 5.13 in. |
| July | 70.9 °F | 89.3 °F | 5.53 in. |
| August | 69.3 °F | 87.7 °F | 6.37 in. |
| September | 64.2 °F | 82.7 °F | 6.17 in. |
| October | 52.3 °F | 73.9 °F | 3.99 in. |
| November | 41.5 °F | 63.8 °F | 3.49 in. |
| December | 35.5 °F | 56.0 °F | 3.53 in. |
| Annual | 51.3 °F | 71.8 °F | 53.14 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |