Boston, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.4 °C (low) to 25.8 °C (high). Annual precipitation averages 1374.7 Millimeters. 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 | 4.1 °C | 16.8 °C | 123.19 mm |
| February | 5.8 °C | 19 °C | 107.7 mm |
| March | 8.8 °C | 22.6 °C | 140.72 mm |
| April | 12.5 °C | 26.1 °C | 91.19 mm |
| May | 16.9 °C | 29.9 °C | 76.2 mm |
| June | 20.8 °C | 32.1 °C | 153.92 mm |
| July | 21.9 °C | 32.9 °C | 153.16 mm |
| August | 21.9 °C | 32.6 °C | 146.3 mm |
| September | 19.7 °C | 30.7 °C | 119.13 mm |
| October | 14.1 °C | 26.9 °C | 81.28 mm |
| November | 8.4 °C | 21.9 °C | 78.99 mm |
| December | 5.6 °C | 18.2 °C | 102.87 mm |
| Annual | 13.4 °C | 25.8 °C | 1374.65 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |