| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F |
| 2012 Hardiness Zone: | 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 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 82e - Central Maine Embayment |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 04957 - Norridgewock, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 5 | 7 | 18 | 31 | 41 | 51 | 56 | 55 | 46 | 36 | 27 | 13 | 32 |
| Avg Max Temp (°F) | 27 | 31 | 40 | 52 | 66 | 74 | 79 | 78 | 69 | 57 | 44 | 32 | 54 |
| Avg Precip (In.) | 3.29 | 2.38 | 3.39 | 3.45 | 3.71 | 3.74 | 3.45 | 3.41 | 3.49 | 3.68 | 3.69 | 3.35 | 41.02 |