Millwood, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.4 °F (low) to 78.5 °F (high). Annual precipitation averages 49.6 Inches. Millwood is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.5 °F | 62.3 °F | 4.34 in. |
| February | 41.3 °F | 65.8 °F | 3.8 in. |
| March | 46.8 °F | 72.4 °F | 4.44 in. |
| April | 53.8 °F | 79.0 °F | 3.34 in. |
| May | 61.5 °F | 85.7 °F | 2.94 in. |
| June | 69.1 °F | 90.2 °F | 5.79 in. |
| July | 71.6 °F | 92.2 °F | 5.46 in. |
| August | 71.5 °F | 91.2 °F | 6.14 in. |
| September | 67.1 °F | 87.2 °F | 4.35 in. |
| October | 56.7 °F | 79.9 °F | 3.25 in. |
| November | 45.7 °F | 71.5 °F | 2.39 in. |
| December | 40.7 °F | 64.7 °F | 3.36 in. |
| Annual | 55.4 °F | 78.5 °F | 49.6 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |