Dover, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.7 °C (low) to 20.6 °C (high). Annual precipitation averages 1382.8 Millimeters. Dover 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 | -2.4 °C | 7.7 °C | 104.9 mm |
| February | -1.4 °C | 10.4 °C | 114.55 mm |
| March | 3.3 °C | 15.7 °C | 128.52 mm |
| April | 8.3 °C | 21.4 °C | 133.1 mm |
| May | 13.7 °C | 25.5 °C | 147.83 mm |
| June | 18.4 °C | 29.5 °C | 119.13 mm |
| July | 20.2 °C | 31.4 °C | 110.49 mm |
| August | 18.9 °C | 31.3 °C | 89.41 mm |
| September | 14.8 °C | 27.9 °C | 94.49 mm |
| October | 8.2 °C | 21.8 °C | 103.12 mm |
| November | 2.9 °C | 15.4 °C | 107.44 mm |
| December | -0.9 °C | 9.4 °C | 129.79 mm |
| Annual | 8.7 °C | 20.6 °C | 1382.77 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 |