| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| 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 02370 - Rockland, MA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 21 | 29 | 37 | 47 | 56 | 62 | 61 | 52 | 42 | 34 | 24 | 40 |
| Avg Max Temp (°F) | 37 | 39 | 47 | 57 | 68 | 77 | 82 | 80 | 73 | 62 | 52 | 41 | 60 |
| Avg Precip (In.) | 4.65 | 3.93 | 4.59 | 4.35 | 3.7 | 3.51 | 3.58 | 4.19 | 4.03 | 4.3 | 4.69 | 4.42 | 49.96 |