Hammondsport, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.2 °C (low) to 14.7 °C (high). Annual precipitation averages 851.9 Millimeters. Hammondsport is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.8 °C | 0.6 °C | 50.8 mm |
| February | -8.4 °C | 1.8 °C | 43.43 mm |
| March | -4.6 °C | 6.6 °C | 59.69 mm |
| April | 1.2 °C | 14.1 °C | 72.64 mm |
| May | 7.3 °C | 20.8 °C | 73.15 mm |
| June | 12.6 °C | 25.4 °C | 87.63 mm |
| July | 15.1 °C | 27.9 °C | 88.65 mm |
| August | 14.2 °C | 27 °C | 84.84 mm |
| September | 10.4 °C | 23.3 °C | 90.68 mm |
| October | 4.7 °C | 16.3 °C | 81.28 mm |
| November | -0.6 °C | 9.3 °C | 62.74 mm |
| December | -5.1 °C | 3.4 °C | 56.39 mm |
| Annual | 3.2 °C | 14.7 °C | 851.92 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |