| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°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: | 83c - Ontario Lowlands |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 13650 - Henderson, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 11 | 21 | 33 | 44 | 53 | 59 | 57 | 50 | 39 | 30 | 17 | 35 |
| Avg Max Temp (°F) | 30 | 31 | 41 | 53 | 67 | 75 | 80 | 78 | 70 | 59 | 46 | 35 | 55 |
| Avg Precip (In.) | 3.32 | 2.54 | 2.82 | 3.06 | 3.12 | 3.18 | 2.88 | 3.43 | 4.22 | 3.44 | 4.04 | 3.34 | 39.4 |