| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 11 - May 20 | |
| 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 04005 - Biddeford, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 17 | 26 | 36 | 45 | 54 | 60 | 59 | 50 | 40 | 32 | 21 | 38 |
| Avg Max Temp (°F) | 34 | 36 | 45 | 56 | 68 | 77 | 83 | 81 | 73 | 61 | 49 | 38 | 58 |
| Avg Precip (In.) | 3.85 | 3.16 | 4.1 | 4.27 | 3.96 | 3.68 | 3.43 | 3.23 | 3.52 | 4.29 | 4.86 | 4.07 | 46.42 |