| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 58b - Western New England Marble Valleys |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 12529 - Hillsdale, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 14 | 23 | 33 | 44 | 53 | 57 | 56 | 48 | 36 | 29 | 19 | 35 |
| Avg Max Temp (°F) | 32 | 35 | 44 | 57 | 68 | 76 | 81 | 79 | 71 | 60 | 48 | 36 | 57 |
| Avg Precip (In.) | 3.59 | 2.99 | 3.73 | 3.87 | 4.7 | 4.13 | 4.26 | 4.51 | 4.03 | 3.89 | 3.98 | 3.57 | 47.24 |