Gatlinburg, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.5 °C (low) to 20.5 °C (high). Annual precipitation averages 1412.7 Millimeters. Gatlinburg 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 | -2.7 °C | 8.9 °C | 118.36 mm |
| February | -1.2 °C | 11.3 °C | 105.92 mm |
| March | 2.1 °C | 16.1 °C | 134.11 mm |
| April | 6.4 °C | 21.3 °C | 118.11 mm |
| May | 11.7 °C | 25.2 °C | 130.56 mm |
| June | 16 °C | 28.5 °C | 139.95 mm |
| July | 18.1 °C | 30 °C | 152.4 mm |
| August | 17.4 °C | 29.6 °C | 107.95 mm |
| September | 14.2 °C | 27 °C | 100.08 mm |
| October | 7.4 °C | 21.7 °C | 78.99 mm |
| November | 1.6 °C | 15.6 °C | 101.6 mm |
| December | -1 °C | 10.6 °C | 124.71 mm |
| Annual | 7.5 °C | 20.5 °C | 1412.74 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |