Ducktown, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.4 °C (low) to 20.7 °C (high). Annual precipitation averages 1560.3 Millimeters. Ducktown is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.7 °C | 9.5 °C | 144.78 mm |
| February | -0.9 °C | 11.7 °C | 127 mm |
| March | 2.2 °C | 15.9 °C | 138.68 mm |
| April | 6.2 °C | 21.2 °C | 126.49 mm |
| May | 11.3 °C | 25.1 °C | 119.63 mm |
| June | 15.6 °C | 28.5 °C | 142.75 mm |
| July | 17.7 °C | 30.1 °C | 142.24 mm |
| August | 17.3 °C | 29.9 °C | 146.05 mm |
| September | 13.7 °C | 27.2 °C | 113.79 mm |
| October | 7.2 °C | 22.1 °C | 94.49 mm |
| November | 1.6 °C | 15.9 °C | 122.94 mm |
| December | -0.8 °C | 11.2 °C | 141.48 mm |
| Annual | 7.4 °C | 20.7 °C | 1560.32 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |