Sherborn, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.6 °F (low) to 60.4 °F (high). Annual precipitation averages 48.5 Inches. Sherborn is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.6 °F | 36.4 °F | 3.84 in. |
| February | 19.1 °F | 39.1 °F | 3.33 in. |
| March | 26.7 °F | 46.3 °F | 4.52 in. |
| April | 36.8 °F | 58.6 °F | 4.29 in. |
| May | 46.7 °F | 69.0 °F | 3.54 in. |
| June | 56.1 °F | 77.6 °F | 4.21 in. |
| July | 62.0 °F | 83.3 °F | 3.62 in. |
| August | 60.4 °F | 81.9 °F | 3.86 in. |
| September | 52.6 °F | 75.1 °F | 3.84 in. |
| October | 41.2 °F | 63.1 °F | 4.79 in. |
| November | 32.0 °F | 52.2 °F | 3.96 in. |
| December | 23.8 °F | 42.0 °F | 4.74 in. |
| Annual | 39.6 °F | 60.4 °F | 48.54 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |