| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F 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 11 - May 20 |
| 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 04660 - Mount Desert, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 14 | 24 | 33 | 43 | 51 | 57 | 56 | 49 | 40 | 31 | 19 | 36 |
| Avg Max Temp (°F) | 30 | 33 | 41 | 53 | 65 | 73 | 78 | 77 | 68 | 57 | 46 | 36 | 55 |
| Avg Precip (In.) | 5 | 3.7 | 4.46 | 4.22 | 3.83 | 3.62 | 3.26 | 2.78 | 4.17 | 4.48 | 5.1 | 4.64 | 49.26 |