Popponesset, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 44.5 °F (low) to 58.5 °F (high). Annual precipitation averages 49.2 Inches. Popponesset is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.0 °F | 39.1 °F | 4.19 in. |
| February | 25.6 °F | 39.8 °F | 3.71 in. |
| March | 30.8 °F | 45.0 °F | 5.1 in. |
| April | 39.5 °F | 53.5 °F | 4.39 in. |
| May | 48.7 °F | 62.9 °F | 3.5 in. |
| June | 58.0 °F | 72.0 °F | 3.67 in. |
| July | 64.9 °F | 78.6 °F | 2.96 in. |
| August | 64.5 °F | 78.0 °F | 3.59 in. |
| September | 58.2 °F | 72.4 °F | 4.04 in. |
| October | 48.2 °F | 62.5 °F | 4.75 in. |
| November | 39.2 °F | 53.2 °F | 4.16 in. |
| December | 31.0 °F | 44.8 °F | 5.15 in. |
| Annual | 44.5 °F | 58.5 °F | 49.21 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |