| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 83e - Upper St. Lawrence Valley |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 13697 - Winthrop, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 6 | 8 | 19 | 33 | 45 | 54 | 59 | 57 | 48 | 38 | 28 | 13 | 34 |
| Avg Max Temp (°F) | 25 | 28 | 39 | 53 | 68 | 76 | 80 | 78 | 69 | 57 | 44 | 31 | 54 |
| Avg Precip (In.) | 2.34 | 2.04 | 2.38 | 2.9 | 2.94 | 3.54 | 3.66 | 3.88 | 3.94 | 3.14 | 3.24 | 2.76 | 36.76 |