| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| 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 04971 - Saint Albans, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 2 | 4 | 17 | 29 | 41 | 50 | 56 | 53 | 44 | 33 | 25 | 11 | 30 |
| Avg Max Temp (°F) | 26 | 29 | 39 | 51 | 65 | 74 | 79 | 77 | 68 | 56 | 43 | 31 | 53 |
| Avg Precip (In.) | 3.51 | 2.59 | 3.61 | 3.69 | 3.74 | 3.96 | 3.53 | 3.64 | 3.82 | 3.83 | 3.9 | 3.42 | 43.24 |