Henderson, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.1 °C (low) to 21.4 °C (high). Annual precipitation averages 1479.8 Millimeters. Henderson 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 | -1.9 °C | 9.1 °C | 107.19 mm |
| February | -0.3 °C | 11.7 °C | 137.67 mm |
| March | 3.8 °C | 16.7 °C | 155.45 mm |
| April | 8.4 °C | 22 °C | 145.8 mm |
| May | 13.9 °C | 26.2 °C | 144.27 mm |
| June | 18.5 °C | 30.1 °C | 118.87 mm |
| July | 20.4 °C | 31.8 °C | 123.7 mm |
| August | 19.5 °C | 31.6 °C | 86.61 mm |
| September | 15.6 °C | 28.4 °C | 108.71 mm |
| October | 8.8 °C | 22.6 °C | 104.14 mm |
| November | 3.2 °C | 16.1 °C | 104.65 mm |
| December | -0.2 °C | 10.7 °C | 142.75 mm |
| Annual | 9.1 °C | 21.4 °C | 1479.81 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 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |