| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 82d - Central Foothills |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 04430 - East Millinocket, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 2 | 4 | 16 | 30 | 41 | 51 | 57 | 55 | 45 | 34 | 26 | 11 | 31 |
| Avg Max Temp (°F) | 24 | 28 | 37 | 50 | 64 | 73 | 79 | 77 | 67 | 55 | 42 | 29 | 52 |
| Avg Precip (In.) | 3.37 | 2.42 | 3.13 | 3.48 | 3.74 | 3.91 | 3.75 | 3.77 | 3.64 | 3.62 | 3.71 | 3.44 | 41.96 |