| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 82f - Midcoast |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 04008 - Bowdoinham, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 13 | 23 | 34 | 43 | 53 | 59 | 57 | 49 | 38 | 29 | 17 | 35 |
| Avg Max Temp (°F) | 30 | 33 | 42 | 54 | 66 | 74 | 80 | 79 | 70 | 59 | 47 | 35 | 56 |
| Avg Precip (In.) | 4 | 3.26 | 4.4 | 4.3 | 3.96 | 3.64 | 3.33 | 3.14 | 3.66 | 4.12 | 4.65 | 4.3 | 46.77 |