Harrisburg, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.4 °F (low) to 71.6 °F (high). Annual precipitation averages 48.1 Inches. Harrisburg 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 | 30.3 °F | 51.8 °F | 3.69 in. |
| February | 32.8 °F | 55.6 °F | 3.27 in. |
| March | 39.4 °F | 63.0 °F | 4.18 in. |
| April | 48.2 °F | 72.5 °F | 4.01 in. |
| May | 57.2 °F | 79.5 °F | 3.79 in. |
| June | 65.5 °F | 86.5 °F | 4.69 in. |
| July | 69.1 °F | 89.8 °F | 4.78 in. |
| August | 67.7 °F | 88.0 °F | 4.86 in. |
| September | 61.7 °F | 82.5 °F | 4.25 in. |
| October | 49.3 °F | 73.0 °F | 3.52 in. |
| November | 38.4 °F | 62.7 °F | 3.37 in. |
| December | 32.8 °F | 54.5 °F | 3.67 in. |
| Annual | 49.4 °F | 71.6 °F | 48.08 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 7b : 5°F to 10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |