| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 58q - Sunapee Uplands |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 03269 - Sanbornton, NH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 10 | 21 | 31 | 42 | 52 | 56 | 54 | 46 | 35 | 27 | 15 | 33 |
| Avg Max Temp (°F) | 29 | 32 | 42 | 54 | 68 | 76 | 81 | 78 | 69 | 58 | 45 | 33 | 55 |
| Avg Precip (In.) | 3.8 | 2.78 | 3.61 | 3.65 | 3.88 | 3.85 | 4.14 | 3.92 | 3.57 | 4.07 | 3.99 | 3.53 | 44.77 |