West Bridgewater, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40.3 °F (low) to 60.6 °F (high). Annual precipitation averages 50.9 Inches. West Bridgewater 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 | 19.2 °F | 37.5 °F | 4.22 in. |
| February | 20.3 °F | 39.7 °F | 3.61 in. |
| March | 27.5 °F | 46.7 °F | 5.28 in. |
| April | 37.1 °F | 58.4 °F | 4.63 in. |
| May | 46.8 °F | 68.7 °F | 3.56 in. |
| June | 56.2 °F | 77.6 °F | 3.97 in. |
| July | 62.3 °F | 83.3 °F | 3.47 in. |
| August | 60.7 °F | 82.0 °F | 3.71 in. |
| September | 53.3 °F | 74.8 °F | 4.0 in. |
| October | 42.0 °F | 63.1 °F | 5.03 in. |
| November | 32.9 °F | 52.6 °F | 4.41 in. |
| December | 24.9 °F | 42.9 °F | 5.0 in. |
| Annual | 40.3 °F | 60.6 °F | 50.89 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 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |