| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 3b: -35F to -30F |
| 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: | 58ab - Northern and Western Adirondack Foothills |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 13648 - Harrisville, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 5 | 6 | 18 | 31 | 43 | 52 | 56 | 55 | 46 | 36 | 27 | 13 | 32 |
| Avg Max Temp (°F) | 26 | 29 | 39 | 52 | 66 | 74 | 79 | 77 | 68 | 57 | 44 | 32 | 54 |
| Avg Precip (In.) | 3.04 | 2.33 | 2.78 | 3.18 | 3.36 | 3.51 | 3.66 | 3.96 | 4.32 | 3.52 | 3.9 | 3.26 | 40.81 |