Tellico Plains, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.3 °C (low) to 21.6 °C (high). Annual precipitation averages 1455.9 Millimeters. Tellico Plains is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2 °C | 9.5 °C | 121.41 mm |
| February | -0.6 °C | 11.8 °C | 120.65 mm |
| March | 3 °C | 16.7 °C | 135.38 mm |
| April | 7.3 °C | 22.2 °C | 113.79 mm |
| May | 12.6 °C | 26.6 °C | 143 mm |
| June | 17.2 °C | 30.1 °C | 131.83 mm |
| July | 19.3 °C | 31.8 °C | 139.95 mm |
| August | 18.6 °C | 31.4 °C | 114.3 mm |
| September | 15 °C | 28.8 °C | 99.82 mm |
| October | 7.9 °C | 22.9 °C | 72.64 mm |
| November | 1.9 °C | 16.2 °C | 122.43 mm |
| December | -0.3 °C | 11.2 °C | 140.72 mm |
| Annual | 8.3 °C | 21.6 °C | 1455.92 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |