Friendsville, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.1 °C (low) to 21.1 °C (high). Annual precipitation averages 1431.3 Millimeters. Friendsville 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 | -1.8 °C | 8.9 °C | 128.27 mm |
| February | -0.2 °C | 11.4 °C | 134.62 mm |
| March | 3.4 °C | 16.3 °C | 129.03 mm |
| April | 8.2 °C | 21.6 °C | 128.52 mm |
| May | 13.3 °C | 26 °C | 104.65 mm |
| June | 17.9 °C | 29.6 °C | 119.13 mm |
| July | 20.2 °C | 31.3 °C | 158.75 mm |
| August | 19.5 °C | 30.9 °C | 92.2 mm |
| September | 16 °C | 28.4 °C | 106.43 mm |
| October | 9.2 °C | 22.3 °C | 82.3 mm |
| November | 2.8 °C | 15.8 °C | 107.19 mm |
| December | 0.1 °C | 10.7 °C | 140.21 mm |
| Annual | 9.1 °C | 21.1 °C | 1431.3 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 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 |