| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F | |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfc - Subarctic With Cool Summers And Year Around Rainfall | |
| Ecoregion: | 58r - Sebago-Ossipee Hills and Plains | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 04068 - Porter, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 5 | 8 | 19 | 30 | 41 | 50 | 56 | 53 | 45 | 34 | 26 | 13 | 32 |
| Avg Max Temp (°F) | 29 | 33 | 42 | 54 | 67 | 75 | 80 | 78 | 69 | 58 | 45 | 34 | 55 |
| Avg Precip (In.) | 3.94 | 3.08 | 4.05 | 4.01 | 3.95 | 3.88 | 3.92 | 3.81 | 3.65 | 4.3 | 4.35 | 3.96 | 46.89 |