| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 82h - Penobscot Lowlands |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 04448 - Howland, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 1 | 3 | 16 | 29 | 40 | 49 | 55 | 52 | 43 | 33 | 25 | 10 | 30 |
| Avg Max Temp (°F) | 26 | 29 | 39 | 51 | 65 | 74 | 79 | 78 | 68 | 56 | 43 | 31 | 53 |
| Avg Precip (In.) | 3.54 | 2.59 | 3.42 | 3.5 | 3.73 | 3.93 | 3.77 | 3.46 | 3.83 | 3.61 | 3.97 | 3.61 | 42.95 |