Cornelius, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.8 °F (low) to 70.8 °F (high). Annual precipitation averages 45.8 Inches. Cornelius is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 29.8 °F | 50.8 °F | 3.63 in. |
| February | 32.1 °F | 54.8 °F | 3.12 in. |
| March | 38.8 °F | 62.5 °F | 4.13 in. |
| April | 47.5 °F | 71.5 °F | 3.9 in. |
| May | 56.8 °F | 78.5 °F | 3.68 in. |
| June | 65.0 °F | 85.6 °F | 4.29 in. |
| July | 68.7 °F | 88.7 °F | 4.18 in. |
| August | 67.2 °F | 87.2 °F | 4.42 in. |
| September | 61.1 °F | 81.8 °F | 4.14 in. |
| October | 48.7 °F | 72.4 °F | 3.32 in. |
| November | 37.7 °F | 61.9 °F | 3.29 in. |
| December | 32.3 °F | 53.7 °F | 3.69 in. |
| Annual | 48.8 °F | 70.8 °F | 45.79 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 |