| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°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: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 82g - Downeast Coast |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 04614 - Blue Hill, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 13 | 23 | 32 | 42 | 51 | 57 | 56 | 48 | 39 | 30 | 17 | 35 |
| Avg Max Temp (°F) | 30 | 33 | 41 | 52 | 65 | 73 | 79 | 77 | 69 | 57 | 46 | 35 | 55 |
| Avg Precip (In.) | 4.3 | 3.22 | 4.24 | 4.19 | 3.89 | 3.64 | 3.37 | 2.95 | 4.01 | 4.17 | 4.72 | 4.22 | 46.92 |