Atlanta, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.6 °C (low) to 21.9 °C (high). Annual precipitation averages 1359.9 Millimeters. Atlanta is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0 °C | 11.3 °C | 121.41 mm |
| February | 1.7 °C | 13.4 °C | 122.68 mm |
| March | 5.2 °C | 17.8 °C | 130.3 mm |
| April | 9.8 °C | 22.3 °C | 106.43 mm |
| May | 14.9 °C | 26.3 °C | 98.04 mm |
| June | 19.2 °C | 29.6 °C | 110.74 mm |
| July | 21.1 °C | 31.2 °C | 132.08 mm |
| August | 20.7 °C | 30.8 °C | 109.98 mm |
| September | 17.3 °C | 28 °C | 103.63 mm |
| October | 10.9 °C | 22.7 °C | 93.73 mm |
| November | 4.7 °C | 17.1 °C | 108.2 mm |
| December | 1.7 °C | 12.6 °C | 122.68 mm |
| Annual | 10.6 °C | 21.9 °C | 1359.9 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |