| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°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 Zone 6a: -10°F to -5°F 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: | 58f - Vermont Piedmont | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 03781 - Plainfield, NH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 6 | 8 | 20 | 31 | 42 | 51 | 56 | 54 | 46 | 34 | 27 | 14 | 32 |
| Avg Max Temp (°F) | 28 | 32 | 42 | 54 | 68 | 76 | 81 | 79 | 70 | 58 | 45 | 33 | 56 |
| Avg Precip (In.) | 3.15 | 2.42 | 2.89 | 3.06 | 3.56 | 3.22 | 3.56 | 3.58 | 3.57 | 3.54 | 3.34 | 3.04 | 38.92 |