Holden, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.1 °F (low) to 57.4 °F (high). Annual precipitation averages 50.6 Inches. Holden is located in USDA Plant Hardiness Zone 6a. 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 | 15.3 °F | 32.8 °F | 3.9 in. |
| February | 16.6 °F | 35.5 °F | 3.47 in. |
| March | 24.5 °F | 43.1 °F | 4.62 in. |
| April | 35.2 °F | 56.2 °F | 4.29 in. |
| May | 46.0 °F | 67.1 °F | 3.8 in. |
| June | 55.4 °F | 75.3 °F | 4.34 in. |
| July | 61.0 °F | 80.7 °F | 3.95 in. |
| August | 59.3 °F | 79.1 °F | 4.18 in. |
| September | 51.7 °F | 72.2 °F | 4.24 in. |
| October | 40.2 °F | 60.1 °F | 5.19 in. |
| November | 30.6 °F | 48.8 °F | 3.97 in. |
| December | 21.9 °F | 38.4 °F | 4.64 in. |
| Annual | 38.1 °F | 57.4 °F | 50.59 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |