Summit, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2 °C (low) to 11.7 °C (high). Annual precipitation averages 1186.5 Millimeters. Summit is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.1 °C | -2.8 °C | 79.76 mm |
| February | -9.7 °C | -1.7 °C | 62.74 mm |
| March | -5.9 °C | 2.6 °C | 90.68 mm |
| April | 0.2 °C | 11.5 °C | 91.19 mm |
| May | 6.4 °C | 18.2 °C | 100.08 mm |
| June | 11.8 °C | 22.5 °C | 118.62 mm |
| July | 14 °C | 24.9 °C | 115.32 mm |
| August | 13.1 °C | 24.2 °C | 112.27 mm |
| September | 9.7 °C | 20.6 °C | 109.98 mm |
| October | 4.2 °C | 13.8 °C | 113.54 mm |
| November | -1.3 °C | 5.8 °C | 86.87 mm |
| December | -7.2 °C | 0.2 °C | 105.41 mm |
| Annual | 2 °C | 11.7 °C | 1186.46 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |