| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 58b - Western New England Marble Valleys |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 01224 - Berkshire, MA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 12 | 21 | 31 | 42 | 50 | 55 | 54 | 45 | 34 | 27 | 17 | 33 |
| Avg Max Temp (°F) | 30 | 33 | 42 | 54 | 67 | 74 | 79 | 77 | 69 | 58 | 46 | 35 | 55 |
| Avg Precip (In.) | 3.18 | 2.55 | 3.27 | 3.74 | 4.69 | 4.34 | 4.49 | 4.31 | 3.85 | 3.72 | 3.74 | 3.09 | 44.97 |