West Bridgewater, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.6 °C (low) to 15.9 °C (high). Annual precipitation averages 1292.6 Millimeters. 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 | -7.1 °C | 3.1 °C | 107.19 mm |
| February | -6.5 °C | 4.3 °C | 91.69 mm |
| March | -2.5 °C | 8.2 °C | 134.11 mm |
| April | 2.8 °C | 14.7 °C | 117.6 mm |
| May | 8.2 °C | 20.4 °C | 90.42 mm |
| June | 13.4 °C | 25.3 °C | 100.84 mm |
| July | 16.8 °C | 28.5 °C | 88.14 mm |
| August | 15.9 °C | 27.8 °C | 94.23 mm |
| September | 11.8 °C | 23.8 °C | 101.6 mm |
| October | 5.6 °C | 17.3 °C | 127.76 mm |
| November | 0.5 °C | 11.4 °C | 112.01 mm |
| December | -3.9 °C | 6.1 °C | 127 mm |
| Annual | 4.6 °C | 15.9 °C | 1292.59 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |