Clarksville, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.6 °C (low) to 20.7 °C (high). Annual precipitation averages 1366 Millimeters. Clarksville 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.7 °C | 7.6 °C | 107.44 mm |
| February | -1.4 °C | 10.2 °C | 116.08 mm |
| March | 2.7 °C | 15.3 °C | 128.02 mm |
| April | 7.9 °C | 21.3 °C | 134.87 mm |
| May | 13.5 °C | 25.7 °C | 141.99 mm |
| June | 18.1 °C | 29.8 °C | 107.95 mm |
| July | 20.2 °C | 31.6 °C | 122.17 mm |
| August | 19.2 °C | 31.6 °C | 85.85 mm |
| September | 15.1 °C | 28.4 °C | 89.41 mm |
| October | 8.5 °C | 22.3 °C | 103.89 mm |
| November | 2.7 °C | 15.3 °C | 101.09 mm |
| December | -0.9 °C | 9.6 °C | 127.25 mm |
| Annual | 8.6 °C | 20.7 °C | 1366.01 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |