Morrisville, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.1 °F (low) to 70.6 °F (high). Annual precipitation averages 48.2 Inches. Morrisville 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 | 29.8 °F | 50.8 °F | 3.54 in. |
| February | 31.7 °F | 54.4 °F | 3.03 in. |
| March | 38.2 °F | 62.2 °F | 4.09 in. |
| April | 47.4 °F | 71.8 °F | 3.67 in. |
| May | 57.0 °F | 78.6 °F | 3.62 in. |
| June | 65.1 °F | 85.6 °F | 4.27 in. |
| July | 69.3 °F | 88.9 °F | 4.96 in. |
| August | 68.0 °F | 87.0 °F | 4.82 in. |
| September | 62.0 °F | 81.4 °F | 5.53 in. |
| October | 49.3 °F | 71.7 °F | 3.74 in. |
| November | 38.3 °F | 61.6 °F | 3.39 in. |
| December | 32.8 °F | 53.6 °F | 3.55 in. |
| Annual | 49.1 °F | 70.6 °F | 48.21 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |