Sugar Mountain, North Carolina has a Temperate Oceanic Climate climate (Köppen classification: Cfb). Average annual temperatures range from 4.6 °C (low) to 14.2 °C (high). Annual precipitation averages 1535.4 Millimeters. Sugar Mountain is located in USDA Plant Hardiness Zone 6b. 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 | -6 °C | 3.5 °C | 121.92 mm |
| February | -4.5 °C | 5.2 °C | 99.82 mm |
| March | -1.3 °C | 8.8 °C | 124.71 mm |
| April | 3.4 °C | 14.6 °C | 136.14 mm |
| May | 8.8 °C | 18.5 °C | 146.05 mm |
| June | 12.8 °C | 21.9 °C | 142.49 mm |
| July | 14.9 °C | 23.7 °C | 159.51 mm |
| August | 14 °C | 22.9 °C | 135.38 mm |
| September | 11.1 °C | 20.3 °C | 141.22 mm |
| October | 5 °C | 15.3 °C | 107.44 mm |
| November | 0.1 °C | 10 °C | 100.58 mm |
| December | -3.7 °C | 5.4 °C | 120.14 mm |
| Annual | 4.6 °C | 14.2 °C | 1535.4 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfb - Temperate Oceanic Climate |