| 2023 Hardiness Zone: | 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: | September 21 - 30 |
| Average Last Frost Date: | May 11 - 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 58r - Sebago-Ossipee Hills and Plains |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 04062 - Windham, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 9 | 12 | 22 | 33 | 43 | 52 | 58 | 56 | 48 | 37 | 29 | 17 | 35 |
| Avg Max Temp (°F) | 30 | 34 | 43 | 54 | 67 | 75 | 80 | 79 | 70 | 59 | 47 | 35 | 56 |
| Avg Precip (In.) | 4 | 3.18 | 4.38 | 4.39 | 3.9 | 3.72 | 3.65 | 3.32 | 3.59 | 4.35 | 4.67 | 4.13 | 47.27 |