Shackle Island, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.7 °F (low) to 69.3 °F (high). Annual precipitation averages 53.4 Inches. Shackle Island 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 | 27.6 °F | 46.3 °F | 4.18 in. |
| February | 30.2 °F | 50.9 °F | 4.51 in. |
| March | 37.5 °F | 59.9 °F | 4.9 in. |
| April | 46.1 °F | 70.1 °F | 5.07 in. |
| May | 55.8 °F | 78.1 °F | 5.55 in. |
| June | 64.7 °F | 85.5 °F | 4.45 in. |
| July | 68.4 °F | 89.0 °F | 4.68 in. |
| August | 67.0 °F | 88.5 °F | 3.81 in. |
| September | 59.9 °F | 82.9 °F | 3.91 in. |
| October | 47.7 °F | 71.7 °F | 3.6 in. |
| November | 36.8 °F | 59.4 °F | 3.75 in. |
| December | 31.2 °F | 49.7 °F | 4.96 in. |
| Annual | 47.7 °F | 69.3 °F | 53.37 in. |
| 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 : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |