| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°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 13346 - Hamilton, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 12 | 21 | 32 | 43 | 52 | 56 | 55 | 47 | 37 | 29 | 18 | 34 |
| Avg Max Temp (°F) | 30 | 32 | 42 | 54 | 67 | 75 | 80 | 78 | 70 | 59 | 46 | 34 | 56 |
| Avg Precip (In.) | 2.71 | 2.38 | 2.92 | 3.35 | 3.79 | 4.15 | 3.66 | 3.53 | 4.3 | 3.45 | 3.57 | 3.16 | 40.96 |