Cullowhee, North Carolina has a Temperate Oceanic Climate climate (Köppen classification: Cfb). Average annual temperatures range from 6.5 °C (low) to 20.2 °C (high). Annual precipitation averages 1382.8 Millimeters. Cullowhee is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.4 °C | 9.3 °C | 124.21 mm |
| February | -1.8 °C | 11.6 °C | 121.92 mm |
| March | 1.3 °C | 15.9 °C | 122.43 mm |
| April | 5.3 °C | 21 °C | 119.63 mm |
| May | 10.3 °C | 24.7 °C | 112.78 mm |
| June | 14.8 °C | 27.8 °C | 121.92 mm |
| July | 17 °C | 29.4 °C | 122.17 mm |
| August | 16.4 °C | 28.9 °C | 109.47 mm |
| September | 13.2 °C | 26.3 °C | 109.98 mm |
| October | 6.6 °C | 21.3 °C | 82.8 mm |
| November | 0.5 °C | 15.7 °C | 103.38 mm |
| December | -1.7 °C | 10.8 °C | 132.08 mm |
| Annual | 6.5 °C | 20.2 °C | 1382.77 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfb - Temperate Oceanic Climate |