| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F 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 5a: -20F to -15F |
| 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: | 60a - Glaciated Low Plateau |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 13803 - Marathon, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 14 | 23 | 34 | 44 | 54 | 58 | 57 | 49 | 38 | 30 | 20 | 36 |
| Avg Max Temp (°F) | 29 | 32 | 41 | 53 | 66 | 75 | 79 | 78 | 70 | 58 | 45 | 34 | 55 |
| Avg Precip (In.) | 2.6 | 2.33 | 2.96 | 3.53 | 3.62 | 4.01 | 3.52 | 3.5 | 4.02 | 3.28 | 3.5 | 3.07 | 39.93 |