| 2023 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 5a: -20°F to -15°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 4b: -25°F to -20°F Zone 5a: -20°F to -15°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfc - Subarctic With Cool Summers And Year Around Rainfall |
| Ecoregion: | 58p - White Mountains/Blue Mountains |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 03846 - Jackson, NH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 5 | 8 | 18 | 30 | 40 | 49 | 54 | 52 | 43 | 33 | 26 | 13 | 31 |
| Avg Max Temp (°F) | 27 | 31 | 40 | 52 | 65 | 73 | 78 | 76 | 68 | 56 | 44 | 32 | 54 |
| Avg Precip (In.) | 4.09 | 3.11 | 4.07 | 4.15 | 4.13 | 4.39 | 4.26 | 4.45 | 3.95 | 4.46 | 4.44 | 4.03 | 49.53 |