Butner, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.7 °F (low) to 70.7 °F (high). Annual precipitation averages 46.3 Inches. Butner 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.6 °F | 50.5 °F | 3.62 in. |
| February | 30.3 °F | 53.9 °F | 2.98 in. |
| March | 36.6 °F | 61.9 °F | 4.27 in. |
| April | 46.0 °F | 71.9 °F | 3.72 in. |
| May | 55.3 °F | 78.7 °F | 3.72 in. |
| June | 64.4 °F | 85.9 °F | 3.95 in. |
| July | 68.1 °F | 89.4 °F | 4.71 in. |
| August | 66.8 °F | 87.6 °F | 4.09 in. |
| September | 60.5 °F | 81.6 °F | 4.92 in. |
| October | 47.7 °F | 71.6 °F | 3.64 in. |
| November | 36.6 °F | 61.7 °F | 3.23 in. |
| December | 31.2 °F | 53.3 °F | 3.41 in. |
| Annual | 47.7 °F | 70.7 °F | 46.26 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 | Exceptional Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |