Twin City, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54 °F (low) to 76.9 °F (high). Annual precipitation averages 47.7 Inches. Twin City is located in USDA Plant Hardiness Zone 8b. 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 | 36.6 °F | 59.2 °F | 4.12 in. |
| February | 39.3 °F | 63.0 °F | 4.0 in. |
| March | 45.1 °F | 69.8 °F | 4.11 in. |
| April | 52.0 °F | 77.3 °F | 3.42 in. |
| May | 61.0 °F | 84.5 °F | 3.14 in. |
| June | 68.4 °F | 89.8 °F | 5.08 in. |
| July | 71.4 °F | 92.6 °F | 5.01 in. |
| August | 71.0 °F | 91.3 °F | 5.31 in. |
| September | 65.8 °F | 86.6 °F | 3.75 in. |
| October | 54.7 °F | 78.1 °F | 2.85 in. |
| November | 43.9 °F | 68.8 °F | 2.8 in. |
| December | 38.7 °F | 61.5 °F | 4.08 in. |
| Annual | 54 °F | 76.9 °F | 47.67 in. |
| 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 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 |