Farner, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.7 °C (low) to 20.7 °C (high). Annual precipitation averages 1582.4 Millimeters. Farner 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 | -2.4 °C | 9.4 °C | 158.24 mm |
| February | -0.8 °C | 11.6 °C | 122.68 mm |
| March | 2.5 °C | 15.9 °C | 135.89 mm |
| April | 6.7 °C | 21.3 °C | 129.03 mm |
| May | 11.7 °C | 25.1 °C | 118.11 mm |
| June | 16.2 °C | 28.6 °C | 166.62 mm |
| July | 18.2 °C | 30.2 °C | 138.18 mm |
| August | 17.7 °C | 29.9 °C | 126.24 mm |
| September | 14.1 °C | 27.3 °C | 117.09 mm |
| October | 7.6 °C | 22.1 °C | 92.71 mm |
| November | 1.9 °C | 15.9 °C | 128.02 mm |
| December | -0.5 °C | 11.2 °C | 149.61 mm |
| Annual | 7.7 °C | 20.7 °C | 1582.42 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 |