Bells, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.9 °C (low) to 21.1 °C (high). Annual precipitation averages 1387.1 Millimeters. Bells is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.5 °C | 8.3 °C | 104.14 mm |
| February | 0.3 °C | 10.9 °C | 119.13 mm |
| March | 4.4 °C | 15.9 °C | 135.89 mm |
| April | 9.6 °C | 21.7 °C | 131.32 mm |
| May | 15.1 °C | 26.1 °C | 144.27 mm |
| June | 19.5 °C | 30.3 °C | 107.44 mm |
| July | 21.3 °C | 31.8 °C | 103.38 mm |
| August | 20.1 °C | 31.6 °C | 91.19 mm |
| September | 16.1 °C | 28.4 °C | 98.55 mm |
| October | 9.4 °C | 22.7 °C | 99.57 mm |
| November | 3.9 °C | 15.7 °C | 115.32 mm |
| December | 0.2 °C | 10.1 °C | 136.91 mm |
| Annual | 9.9 °C | 21.1 °C | 1387.11 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |