West Wareham, Massachusetts has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.7 °F (low) to 59.8 °F (high). Annual precipitation averages 51.1 Inches. West Wareham is located in USDA Plant Hardiness Zone 7a. 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 | 20.8 °F | 38.2 °F | 4.28 in. |
| February | 22.1 °F | 39.9 °F | 3.68 in. |
| March | 28.6 °F | 46.1 °F | 5.48 in. |
| April | 37.8 °F | 56.4 °F | 4.53 in. |
| May | 47.6 °F | 66.5 °F | 3.65 in. |
| June | 56.9 °F | 75.5 °F | 3.84 in. |
| July | 63.5 °F | 81.7 °F | 3.29 in. |
| August | 62.0 °F | 80.4 °F | 3.69 in. |
| September | 55.0 °F | 73.7 °F | 4.22 in. |
| October | 44.1 °F | 62.8 °F | 4.91 in. |
| November | 34.8 °F | 52.9 °F | 4.42 in. |
| December | 26.8 °F | 43.7 °F | 5.11 in. |
| Annual | 41.7 °F | 59.8 °F | 51.1 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |