| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 58e - Berkshire Transition |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 01034 - Granville, MA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 14 | 23 | 33 | 44 | 53 | 58 | 57 | 48 | 37 | 29 | 19 | 36 |
| Avg Max Temp (°F) | 32 | 35 | 44 | 56 | 69 | 77 | 82 | 79 | 71 | 60 | 49 | 37 | 57 |
| Avg Precip (In.) | 4.58 | 3.31 | 4.43 | 4.78 | 4.7 | 4.31 | 4.31 | 4.65 | 4.51 | 4.88 | 4.45 | 4.6 | 53.51 |