Roan Mountain, Tennessee has a Temperate Oceanic Climate climate (Köppen classification: Cfb). Average annual temperatures range from 41 °F (low) to 63.8 °F (high). Annual precipitation averages 50 Inches. Roan Mountain 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 | 23.1 °F | 44.2 °F | 4.48 in. |
| February | 25.6 °F | 47.8 °F | 3.81 in. |
| March | 31.1 °F | 54.8 °F | 4.22 in. |
| April | 39.4 °F | 64.5 °F | 4.37 in. |
| May | 48.3 °F | 71.6 °F | 4.31 in. |
| June | 55.9 °F | 77.4 °F | 4.47 in. |
| July | 59.6 °F | 80.4 °F | 5.63 in. |
| August | 58.1 °F | 79.4 °F | 4.81 in. |
| September | 51.9 °F | 74.9 °F | 3.32 in. |
| October | 40.9 °F | 65.7 °F | 2.78 in. |
| November | 31.3 °F | 56.5 °F | 3.56 in. |
| December | 26.5 °F | 47.9 °F | 4.28 in. |
| Annual | 41 °F | 63.8 °F | 50.04 in. |
| 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 : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfb - Temperate Oceanic Climate |