| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 58g - Worcester/Monadnock Plateau |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 03048 - Greenville, NH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 13 | 23 | 33 | 43 | 52 | 57 | 55 | 47 | 36 | 28 | 17 | 35 |
| Avg Max Temp (°F) | 31 | 34 | 43 | 55 | 68 | 76 | 80 | 78 | 70 | 60 | 47 | 36 | 57 |
| Avg Precip (In.) | 4.06 | 3.28 | 4.19 | 4.18 | 3.93 | 3.92 | 3.9 | 3.94 | 3.79 | 4.35 | 4.39 | 4.04 | 47.97 |