Mars Hill, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6.6 °C (low) to 19.7 °C (high). Annual precipitation averages 1059.4 Millimeters. Mars Hill is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.3 °C | 8.6 °C | 89.15 mm |
| February | -1.8 °C | 10.5 °C | 79.76 mm |
| March | 1.6 °C | 14.7 °C | 94.49 mm |
| April | 5.8 °C | 20.1 °C | 91.44 mm |
| May | 10.5 °C | 24.1 °C | 97.28 mm |
| June | 14.8 °C | 27.6 °C | 105.92 mm |
| July | 16.8 °C | 29.3 °C | 100.84 mm |
| August | 16.3 °C | 28.7 °C | 93.98 mm |
| September | 12.9 °C | 26 °C | 84.58 mm |
| October | 6.6 °C | 20.8 °C | 59.94 mm |
| November | 1 °C | 15.2 °C | 71.63 mm |
| December | -1.6 °C | 10.3 °C | 90.42 mm |
| Annual | 6.6 °C | 19.7 °C | 1059.43 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |