Williamston, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.8 °F (low) to 71.3 °F (high). Annual precipitation averages 52.5 Inches. Williamston is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 32.0 °F | 52.2 °F | 3.7 in. |
| February | 33.8 °F | 55.3 °F | 3.19 in. |
| March | 40.0 °F | 62.3 °F | 4.07 in. |
| April | 49.4 °F | 71.5 °F | 3.75 in. |
| May | 58.4 °F | 78.5 °F | 3.74 in. |
| June | 66.4 °F | 85.6 °F | 5.09 in. |
| July | 70.4 °F | 88.8 °F | 5.61 in. |
| August | 68.8 °F | 87.0 °F | 5.75 in. |
| September | 63.3 °F | 82.0 °F | 6.71 in. |
| October | 51.2 °F | 73.1 °F | 4.02 in. |
| November | 40.9 °F | 63.3 °F | 3.38 in. |
| December | 35.0 °F | 55.4 °F | 3.52 in. |
| Annual | 50.8 °F | 71.3 °F | 52.53 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |