| 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 5a: -20F to -15F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | Jun. 1 - Jun. 10 |
| 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 03257 - New London, NH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 11 | 21 | 31 | 43 | 52 | 56 | 55 | 47 | 36 | 28 | 16 | 34 |
| Avg Max Temp (°F) | 29 | 32 | 41 | 54 | 68 | 75 | 80 | 77 | 69 | 58 | 45 | 34 | 55 |
| Avg Precip (In.) | 3.47 | 2.82 | 3.51 | 3.76 | 4.25 | 3.81 | 3.97 | 3.98 | 3.77 | 4.29 | 3.97 | 3.5 | 45.11 |