Parishville, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.7 °F (low) to 54.2 °F (high). Annual precipitation averages 44.7 Inches. Parishville is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.9 °F | 26.4 °F | 3.15 in. |
| February | 8.1 °F | 29.0 °F | 2.41 in. |
| March | 17.7 °F | 37.8 °F | 2.83 in. |
| April | 31.4 °F | 52.9 °F | 3.58 in. |
| May | 43.7 °F | 67.9 °F | 3.55 in. |
| June | 53.5 °F | 74.9 °F | 4.72 in. |
| July | 58.0 °F | 79.1 °F | 4.57 in. |
| August | 56.4 °F | 77.6 °F | 3.83 in. |
| September | 48.1 °F | 70.6 °F | 4.09 in. |
| October | 37.3 °F | 57.5 °F | 4.86 in. |
| November | 27.3 °F | 44.1 °F | 3.7 in. |
| December | 15.4 °F | 32.1 °F | 3.37 in. |
| Annual | 33.7 °F | 54.2 °F | 44.66 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |