| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| 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: | 60d - Finger Lakes Uplands and Gorges |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 13045 - Cortland, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 15 | 23 | 34 | 45 | 54 | 58 | 57 | 49 | 39 | 31 | 20 | 37 |
| Avg Max Temp (°F) | 30 | 32 | 41 | 53 | 67 | 75 | 80 | 78 | 70 | 58 | 46 | 34 | 55 |
| Avg Precip (In.) | 2.71 | 2.46 | 3.08 | 3.31 | 3.34 | 4.12 | 3.45 | 3.11 | 4.04 | 3.26 | 3.53 | 3.34 | 39.75 |