| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 59h - Gulf of Maine Coastal Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 03258 - Chichester, NH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 12 | 22 | 32 | 42 | 52 | 57 | 55 | 47 | 36 | 28 | 16 | 34 |
| Avg Max Temp (°F) | 30 | 34 | 43 | 56 | 68 | 77 | 82 | 79 | 71 | 59 | 47 | 35 | 57 |
| Avg Precip (In.) | 3.15 | 2.47 | 3.2 | 3.34 | 3.48 | 3.4 | 3.68 | 3.48 | 3.28 | 3.63 | 3.69 | 3.18 | 39.97 |