| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F 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 | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 01245 - Monterey, MA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 12 | 22 | 32 | 43 | 52 | 56 | 55 | 47 | 36 | 28 | 18 | 34 |
| Avg Max Temp (°F) | 30 | 33 | 42 | 55 | 67 | 74 | 78 | 76 | 68 | 58 | 46 | 34 | 55 |
| Avg Precip (In.) | 3.64 | 2.94 | 3.86 | 3.66 | 4.22 | 3.94 | 4.09 | 4.53 | 3.87 | 3.94 | 3.81 | 3.79 | 46.29 |