Boston, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.1 °F (low) to 56.1 °F (high). Annual precipitation averages 50.7 Inches. Boston is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.4 °F | 31.2 °F | 4.55 in. |
| February | 15.9 °F | 33.2 °F | 3.18 in. |
| March | 22.5 °F | 41.7 °F | 3.82 in. |
| April | 33.5 °F | 54.6 °F | 3.89 in. |
| May | 44.9 °F | 66.8 °F | 3.8 in. |
| June | 54.2 °F | 75.0 °F | 4.4 in. |
| July | 58.5 °F | 78.9 °F | 4.3 in. |
| August | 57.0 °F | 78.0 °F | 4.05 in. |
| September | 50.4 °F | 71.5 °F | 4.6 in. |
| October | 40.0 °F | 59.3 °F | 4.62 in. |
| November | 30.8 °F | 46.9 °F | 4.75 in. |
| December | 22.4 °F | 36.3 °F | 4.71 in. |
| Annual | 37.1 °F | 56.1 °F | 50.67 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |