| 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 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| 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: | 60a - Glaciated Low Plateau | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 14843 - Hornell, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 12 | 21 | 31 | 41 | 50 | 55 | 53 | 46 | 35 | 28 | 19 | 34 |
| Avg Max Temp (°F) | 31 | 34 | 44 | 56 | 68 | 76 | 81 | 79 | 71 | 60 | 47 | 36 | 57 |
| Avg Precip (In.) | 1.82 | 1.61 | 2.17 | 2.92 | 3.02 | 4.38 | 3.23 | 3.24 | 3.71 | 2.81 | 2.84 | 2.17 | 33.94 |