| 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 5a: -20F to -15F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | Jun. 1 - Jun. 10 |
| 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 04276 - Rumford, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 6 | 9 | 20 | 32 | 42 | 52 | 56 | 55 | 47 | 36 | 28 | 14 | 33 |
| Avg Max Temp (°F) | 27 | 31 | 40 | 52 | 66 | 74 | 79 | 77 | 69 | 57 | 43 | 32 | 54 |
| Avg Precip (In.) | 3.26 | 2.25 | 3.54 | 3.63 | 3.79 | 4.14 | 3.71 | 3.96 | 3.53 | 3.78 | 4.02 | 3.24 | 42.84 |