Henning, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.3 °C (low) to 21.2 °C (high). Annual precipitation averages 1389.4 Millimeters. Henning 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 | -1.3 °C | 8.2 °C | 102.87 mm |
| February | 0.6 °C | 11 °C | 114.05 mm |
| March | 4.8 °C | 15.9 °C | 136.4 mm |
| April | 9.9 °C | 21.6 °C | 133.86 mm |
| May | 15.7 °C | 26.4 °C | 143 mm |
| June | 20 °C | 30.5 °C | 116.33 mm |
| July | 21.7 °C | 32 °C | 105.16 mm |
| August | 20.4 °C | 31.6 °C | 85.6 mm |
| September | 16.4 °C | 28.6 °C | 92.46 mm |
| October | 10 °C | 22.8 °C | 102.36 mm |
| November | 4.5 °C | 15.7 °C | 115.57 mm |
| December | 0.4 °C | 10.1 °C | 141.73 mm |
| Annual | 10.3 °C | 21.2 °C | 1389.39 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 |