| 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 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfc - Subarctic With Cool Summers And Year Around Rainfall |
| Ecoregion: | 58r - Sebago-Ossipee Hills and Plains |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 04010 - Brownfield, ME | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 5 | 7 | 19 | 30 | 41 | 50 | 55 | 53 | 44 | 33 | 26 | 13 | 31 |
| Avg Max Temp (°F) | 29 | 32 | 42 | 53 | 67 | 75 | 80 | 78 | 69 | 58 | 45 | 34 | 55 |
| Avg Precip (In.) | 4.2 | 3.19 | 4.22 | 4.19 | 4.02 | 4.08 | 4.03 | 4.03 | 3.72 | 4.45 | 4.41 | 4.04 | 48.58 |