Stillmore, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.5 °F (low) to 77.2 °F (high). Annual precipitation averages 48.4 Inches. Stillmore is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 37.0 °F | 59.7 °F | 4.15 in. |
| February | 39.7 °F | 63.4 °F | 3.91 in. |
| March | 45.5 °F | 70.2 °F | 4.08 in. |
| April | 52.5 °F | 77.8 °F | 3.5 in. |
| May | 61.4 °F | 85.0 °F | 3.29 in. |
| June | 68.9 °F | 90.1 °F | 5.43 in. |
| July | 71.7 °F | 92.7 °F | 5.09 in. |
| August | 71.4 °F | 91.3 °F | 5.46 in. |
| September | 66.3 °F | 86.8 °F | 3.67 in. |
| October | 55.3 °F | 78.4 °F | 2.82 in. |
| November | 44.4 °F | 69.2 °F | 2.84 in. |
| December | 39.4 °F | 62.0 °F | 4.15 in. |
| Annual | 54.5 °F | 77.2 °F | 48.39 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |