Jackson, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.5 °C (low) to 21.6 °C (high). Annual precipitation averages 1440.2 Millimeters. Jackson 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 | -1.7 °C | 8.9 °C | 109.98 mm |
| February | 0 °C | 11.4 °C | 127.76 mm |
| March | 4.1 °C | 16.6 °C | 143.51 mm |
| April | 9 °C | 22.3 °C | 134.37 mm |
| May | 14.6 °C | 26.4 °C | 139.95 mm |
| June | 19.1 °C | 30.4 °C | 122.68 mm |
| July | 20.9 °C | 32.2 °C | 113.54 mm |
| August | 19.9 °C | 31.9 °C | 97.54 mm |
| September | 15.8 °C | 28.9 °C | 104.39 mm |
| October | 9.1 °C | 23.1 °C | 98.55 mm |
| November | 3.4 °C | 16.1 °C | 111.51 mm |
| December | -0.1 °C | 10.6 °C | 136.4 mm |
| Annual | 9.5 °C | 21.6 °C | 1440.18 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 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |