| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 59c - Southern New England Coastal Plains and Hills |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 01834 - Groveland, MA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 18 | 27 | 36 | 46 | 55 | 61 | 60 | 51 | 40 | 32 | 22 | 38 |
| Avg Max Temp (°F) | 35 | 38 | 46 | 57 | 69 | 77 | 83 | 81 | 73 | 62 | 50 | 40 | 59 |
| Avg Precip (In.) | 3.96 | 3.32 | 4.11 | 4.27 | 3.7 | 3.62 | 3.48 | 3.43 | 3.87 | 4.22 | 4.47 | 4.04 | 46.48 |