| 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 Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | September 1 - 10 |
| Average Last Frost Date: | June 1 - 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 03886 - Tamworth, NH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 5 | 8 | 19 | 30 | 40 | 50 | 54 | 52 | 44 | 33 | 26 | 13 | 31 |
| Avg Max Temp (°F) | 29 | 32 | 41 | 53 | 66 | 75 | 80 | 78 | 69 | 57 | 45 | 33 | 55 |
| Avg Precip (In.) | 3.66 | 2.72 | 3.6 | 3.6 | 3.96 | 3.79 | 3.97 | 3.91 | 3.52 | 3.96 | 3.87 | 3.61 | 44.16 |