| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| 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 13108 - Marcellus, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 14 | 23 | 34 | 45 | 54 | 59 | 58 | 50 | 40 | 31 | 20 | 37 |
| Avg Max Temp (°F) | 30 | 32 | 42 | 54 | 67 | 76 | 80 | 78 | 70 | 59 | 46 | 35 | 56 |
| Avg Precip (In.) | 2.68 | 2.23 | 3 | 3.41 | 3.41 | 3.91 | 3.71 | 3.56 | 4.41 | 3.51 | 3.82 | 3.18 | 40.83 |