| 2023 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 4b: -25°F to -20°F Zone 5a: -20°F to -15°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | Jun. 1 - Jun. 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 58u - Moosehead-Churchill Lakes |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 04441 - Greenville, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 1 | 1 | 13 | 25 | 36 | 47 | 52 | 50 | 42 | 33 | 24 | 10 | 28 |
| Avg Max Temp (°F) | 22 | 25 | 35 | 46 | 60 | 72 | 76 | 74 | 65 | 53 | 38 | 27 | 49 |
| Avg Precip (In.) | 3.82 | 2.63 | 3.69 | 3.61 | 3.72 | 4.29 | 4.11 | 3.61 | 3.89 | 3.97 | 3.71 | 3.37 | 44.43 |