Byromville, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.1 °F (low) to 76.7 °F (high). Annual precipitation averages 48.6 Inches. Byromville 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 | 36.4 °F | 58.9 °F | 4.47 in. |
| February | 39.1 °F | 62.5 °F | 4.22 in. |
| March | 45.0 °F | 69.7 °F | 4.89 in. |
| April | 52.7 °F | 77.1 °F | 3.71 in. |
| May | 61.7 °F | 84.7 °F | 2.9 in. |
| June | 69.2 °F | 89.8 °F | 4.47 in. |
| July | 71.7 °F | 91.9 °F | 4.97 in. |
| August | 71.0 °F | 90.8 °F | 4.33 in. |
| September | 65.8 °F | 86.7 °F | 3.9 in. |
| October | 54.4 °F | 78.5 °F | 2.83 in. |
| November | 43.7 °F | 68.8 °F | 3.35 in. |
| December | 38.9 °F | 61.2 °F | 4.6 in. |
| Annual | 54.1 °F | 76.7 °F | 48.64 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 8a : 10°F to 15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |