| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°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: | 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 04015 - Casco, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 9 | 20 | 31 | 42 | 51 | 57 | 55 | 46 | 35 | 27 | 15 | 33 |
| Avg Max Temp (°F) | 29 | 33 | 42 | 53 | 66 | 75 | 80 | 78 | 69 | 58 | 45 | 34 | 55 |
| Avg Precip (In.) | 4.11 | 3.18 | 4.25 | 4.17 | 3.87 | 3.91 | 3.86 | 3.72 | 3.61 | 4.36 | 4.42 | 3.92 | 47.36 |