Palmetto, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.6 °C (low) to 22.3 °C (high). Annual precipitation averages 1363 Millimeters. Palmetto 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 | 0.3 °C | 11.8 °C | 125.22 mm |
| February | 2 °C | 14.2 °C | 127 mm |
| March | 5.6 °C | 18.4 °C | 130.05 mm |
| April | 9.7 °C | 22.8 °C | 109.47 mm |
| May | 14.8 °C | 26.5 °C | 96.01 mm |
| June | 19 °C | 29.7 °C | 111 mm |
| July | 20.8 °C | 31.4 °C | 130.56 mm |
| August | 20.4 °C | 30.8 °C | 114.81 mm |
| September | 17.2 °C | 28.1 °C | 100.08 mm |
| October | 10.9 °C | 22.9 °C | 86.11 mm |
| November | 5.1 °C | 17.6 °C | 106.17 mm |
| December | 1.9 °C | 13.1 °C | 126.49 mm |
| Annual | 10.6 °C | 22.3 °C | 1362.97 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |