| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°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: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 58n - White Mountain Foothills |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 03586 - Sugar Hill, NH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 6 | 7 | 18 | 30 | 41 | 50 | 55 | 53 | 45 | 35 | 26 | 13 | 32 |
| Avg Max Temp (°F) | 26 | 30 | 40 | 53 | 67 | 74 | 78 | 76 | 67 | 55 | 42 | 31 | 53 |
| Avg Precip (In.) | 3.17 | 2.39 | 3.1 | 3.26 | 3.64 | 4.2 | 4.27 | 4.39 | 3.82 | 3.69 | 3.86 | 3.32 | 43.12 |