| 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 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: | Jun. 1 - Jun. 10 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 58n - White Mountain Foothills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 03264 - Plymouth, NH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 6 | 7 | 18 | 30 | 40 | 49 | 54 | 52 | 44 | 33 | 25 | 13 | 31 |
| Avg Max Temp (°F) | 28 | 32 | 41 | 54 | 67 | 75 | 80 | 78 | 69 | 58 | 45 | 33 | 55 |
| Avg Precip (In.) | 3.68 | 2.78 | 3.49 | 3.37 | 3.86 | 3.81 | 4.17 | 3.98 | 3.37 | 4.05 | 4 | 3.48 | 44.04 |