| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| 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: | 59f - Gulf of Maine Coastal Lowland | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 03909 - York, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 16 | 25 | 34 | 44 | 53 | 59 | 57 | 50 | 39 | 31 | 20 | 37 |
| Avg Max Temp (°F) | 33 | 36 | 44 | 56 | 67 | 77 | 81 | 80 | 72 | 61 | 48 | 37 | 58 |
| Avg Precip (In.) | 4.02 | 3.3 | 4.13 | 4.34 | 3.68 | 3.57 | 3.49 | 3.37 | 3.76 | 4.27 | 4.72 | 4.22 | 46.85 |