| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 3b: -35F to -30F |
| Average First Frost Date: | Sep.11 - Sep. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 58o - Northern Connecticut Valley |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 03584 - Lancaster, NH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 2 | 3 | 15 | 28 | 40 | 49 | 54 | 52 | 44 | 33 | 25 | 11 | 30 |
| Avg Max Temp (°F) | 25 | 28 | 39 | 52 | 67 | 75 | 79 | 77 | 68 | 56 | 42 | 30 | 53 |
| Avg Precip (In.) | 2.39 | 1.74 | 2.04 | 2.54 | 3.17 | 3.81 | 3.88 | 4.29 | 3.3 | 3.09 | 2.95 | 2.49 | 35.68 |