| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5a: -20°F to -15°F 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 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 60a - Glaciated Low Plateau |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 13787 - Harpursville, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 13 | 22 | 33 | 43 | 52 | 56 | 55 | 48 | 37 | 29 | 19 | 35 |
| Avg Max Temp (°F) | 31 | 34 | 44 | 57 | 69 | 77 | 81 | 79 | 71 | 60 | 47 | 36 | 57 |
| Avg Precip (In.) | 2.78 | 2.39 | 3.08 | 3.55 | 3.8 | 4.14 | 3.81 | 3.68 | 3.85 | 3.44 | 3.66 | 3.03 | 41.2 |