| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°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 21 - May 31 |
| 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 13634 - Dexter, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 8 | 9 | 20 | 32 | 43 | 52 | 57 | 56 | 48 | 37 | 29 | 16 | 34 |
| Avg Max Temp (°F) | 29 | 31 | 41 | 54 | 67 | 75 | 80 | 78 | 70 | 58 | 46 | 35 | 55 |
| Avg Precip (In.) | 2.84 | 2.24 | 2.43 | 2.8 | 2.88 | 2.88 | 2.53 | 3.17 | 3.94 | 3.13 | 3.5 | 2.88 | 35.22 |