| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| 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 04478 - Rockwood, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -1 | 0 | 11 | 26 | 37 | 48 | 54 | 52 | 43 | 33 | 23 | 8 | 28 |
| Avg Max Temp (°F) | 21 | 25 | 34 | 46 | 61 | 71 | 75 | 74 | 65 | 52 | 39 | 27 | 49 |
| Avg Precip (In.) | 3.02 | 2.21 | 2.91 | 3.33 | 3.64 | 4.12 | 4.13 | 3.76 | 3.79 | 3.54 | 3.47 | 3.06 | 40.98 |