| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 59c - Southern New England Coastal Plains and Hills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 02025 - Cohasset, MA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 22 | 29 | 38 | 47 | 56 | 62 | 61 | 53 | 43 | 35 | 25 | 41 |
| Avg Max Temp (°F) | 37 | 39 | 46 | 56 | 67 | 76 | 82 | 80 | 72 | 62 | 52 | 41 | 59 |
| Avg Precip (In.) | 4.77 | 4.04 | 4.67 | 4.5 | 3.61 | 3.42 | 3.46 | 4.15 | 4.06 | 4.38 | 4.84 | 4.5 | 50.41 |