Boston, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.1 °F (low) to 78.4 °F (high). Annual precipitation averages 54.1 Inches. Boston is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.4 °F | 62.3 °F | 4.85 in. |
| February | 42.4 °F | 66.2 °F | 4.24 in. |
| March | 47.9 °F | 72.6 °F | 5.54 in. |
| April | 54.5 °F | 79.0 °F | 3.59 in. |
| May | 62.4 °F | 85.8 °F | 3.0 in. |
| June | 69.5 °F | 89.8 °F | 6.06 in. |
| July | 71.5 °F | 91.2 °F | 6.03 in. |
| August | 71.5 °F | 90.6 °F | 5.76 in. |
| September | 67.5 °F | 87.2 °F | 4.69 in. |
| October | 57.4 °F | 80.4 °F | 3.2 in. |
| November | 47.1 °F | 71.4 °F | 3.11 in. |
| December | 42.0 °F | 64.7 °F | 4.05 in. |
| Annual | 56.1 °F | 78.4 °F | 54.12 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 10-20 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |