| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 58af - Tug Hill Transition |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 13626 - Copenhagen, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 4 | 6 | 18 | 32 | 45 | 55 | 59 | 57 | 48 | 36 | 26 | 13 | 33 |
| Avg Max Temp (°F) | 26 | 28 | 37 | 50 | 64 | 73 | 77 | 75 | 67 | 55 | 43 | 32 | 52 |
| Avg Precip (In.) | 6.34 | 4.46 | 4.67 | 4.35 | 4.43 | 4.18 | 4.94 | 4.87 | 5.95 | 5.57 | 7.05 | 6.22 | 63.04 |