| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Sep.1 - Sep. 10 |
| Average Last Frost Date: | Jun. 11 - Jun. 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 58n - White Mountain Foothills |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 03580 - Franconia, NH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 5 | 7 | 18 | 30 | 41 | 50 | 54 | 53 | 45 | 34 | 26 | 12 | 31 |
| Avg Max Temp (°F) | 26 | 29 | 39 | 52 | 66 | 74 | 78 | 75 | 67 | 55 | 42 | 30 | 53 |
| Avg Precip (In.) | 2.5 | 1.87 | 2.38 | 2.71 | 3.22 | 3.94 | 3.97 | 4.11 | 3.47 | 3.23 | 3.19 | 2.68 | 37.29 |