Sagamore, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 6.3 °C (low) to 14.9 °C (high). Annual precipitation averages 1278.9 Millimeters. Sagamore 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 | -5 °C | 3.8 °C | 110.24 mm |
| February | -4.5 °C | 4.3 °C | 98.04 mm |
| March | -1.3 °C | 7.4 °C | 130.56 mm |
| April | 3.7 °C | 12.6 °C | 115.82 mm |
| May | 9.1 °C | 18.1 °C | 91.95 mm |
| June | 14.3 °C | 23.1 °C | 94.23 mm |
| July | 18.1 °C | 26.4 °C | 76.71 mm |
| August | 17.6 °C | 25.6 °C | 93.98 mm |
| September | 13.9 °C | 22.2 °C | 107.44 mm |
| October | 8.1 °C | 16.7 °C | 126.24 mm |
| November | 2.9 °C | 11.7 °C | 104.39 mm |
| December | -1.6 °C | 6.8 °C | 129.29 mm |
| Annual | 6.3 °C | 14.9 °C | 1278.89 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 7a : -17.8°C to -15°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 |