| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfc - Subarctic With Cool Summers And Year Around Rainfall |
| Ecoregion: | 58s - Western Maine Foothills |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 04217 - Bethel, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 6 | 8 | 19 | 31 | 42 | 51 | 56 | 54 | 45 | 35 | 27 | 13 | 32 |
| Avg Max Temp (°F) | 27 | 31 | 40 | 52 | 66 | 74 | 79 | 77 | 69 | 57 | 44 | 32 | 54 |
| Avg Precip (In.) | 3.18 | 2.48 | 3.29 | 3.32 | 3.54 | 3.99 | 3.69 | 3.5 | 3.42 | 3.59 | 3.9 | 3.4 | 41.32 |