Holden, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.4 °C (low) to 14.1 °C (high). Annual precipitation averages 1285 Millimeters. 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 | -9.3 °C | 0.4 °C | 99.06 mm |
| February | -8.6 °C | 1.9 °C | 88.14 mm |
| March | -4.2 °C | 6.2 °C | 117.35 mm |
| April | 1.8 °C | 13.4 °C | 108.97 mm |
| May | 7.8 °C | 19.5 °C | 96.52 mm |
| June | 13 °C | 24.1 °C | 110.24 mm |
| July | 16.1 °C | 27.1 °C | 100.33 mm |
| August | 15.2 °C | 26.2 °C | 106.17 mm |
| September | 10.9 °C | 22.3 °C | 107.7 mm |
| October | 4.6 °C | 15.6 °C | 131.83 mm |
| November | -0.8 °C | 9.3 °C | 100.84 mm |
| December | -5.6 °C | 3.6 °C | 117.86 mm |
| Annual | 3.4 °C | 14.1 °C | 1285.01 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |