Savannah, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.7 °C (low) to 25.2 °C (high). Annual precipitation averages 1320.8 Millimeters. Savannah is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.9 °C | 16.3 °C | 91.69 mm |
| February | 5.5 °C | 18.2 °C | 86.61 mm |
| March | 8.9 °C | 21.6 °C | 91.95 mm |
| April | 12.8 °C | 25.2 °C | 81.53 mm |
| May | 17.3 °C | 28.8 °C | 88.65 mm |
| June | 21.3 °C | 31.7 °C | 160.78 mm |
| July | 22.8 °C | 33.3 °C | 151.38 mm |
| August | 22.6 °C | 32.4 °C | 183.64 mm |
| September | 20.4 °C | 30 °C | 125.22 mm |
| October | 14.6 °C | 25.9 °C | 103.63 mm |
| November | 8.6 °C | 21.2 °C | 65.53 mm |
| December | 5.4 °C | 17.6 °C | 90.17 mm |
| Annual | 13.7 °C | 25.2 °C | 1320.78 mm |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |