Parish, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.9 °C (low) to 13.6 °C (high). Annual precipitation averages 1227.6 Millimeters. Parish is located in USDA Plant Hardiness Zone 5b. 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 | -10.2 °C | -0.8 °C | 115.57 mm |
| February | -9.6 °C | 0.3 °C | 88.14 mm |
| March | -5.2 °C | 4.8 °C | 88.14 mm |
| April | 1.1 °C | 12.9 °C | 93.98 mm |
| May | 7.4 °C | 20.1 °C | 97.28 mm |
| June | 12.4 °C | 24.6 °C | 99.06 mm |
| July | 15.1 °C | 26.9 °C | 97.54 mm |
| August | 14.3 °C | 26.2 °C | 96.01 mm |
| September | 10.4 °C | 22.5 °C | 103.89 mm |
| October | 4.8 °C | 15.2 °C | 123.7 mm |
| November | -0.2 °C | 8.4 °C | 110.24 mm |
| December | -5.6 °C | 2.3 °C | 114.05 mm |
| Annual | 2.9 °C | 13.6 °C | 1227.6 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 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 |