Savannah, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.5 °C (low) to 22.1 °C (high). Annual precipitation averages 1418.8 Millimeters. Savannah 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 | -1.4 °C | 9.7 °C | 120.4 mm |
| February | 0.4 °C | 12.5 °C | 127.51 mm |
| March | 4.1 °C | 17.3 °C | 131.32 mm |
| April | 8.8 °C | 22.6 °C | 139.19 mm |
| May | 14.3 °C | 26.8 °C | 139.95 mm |
| June | 18.7 °C | 30.7 °C | 114.55 mm |
| July | 20.6 °C | 32.3 °C | 115.32 mm |
| August | 19.7 °C | 32.1 °C | 96.52 mm |
| September | 15.8 °C | 29.3 °C | 91.69 mm |
| October | 9.1 °C | 23.6 °C | 97.79 mm |
| November | 3.3 °C | 16.7 °C | 106.93 mm |
| December | 0.3 °C | 11.2 °C | 137.67 mm |
| Annual | 9.5 °C | 22.1 °C | 1418.84 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |