Holley, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40.2 °F (low) to 57.6 °F (high). Annual precipitation averages 31.9 Inches. Holley is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.2 °F | 32.9 °F | 2.19 in. |
| February | 18.6 °F | 34.3 °F | 1.79 in. |
| March | 25.8 °F | 42.3 °F | 2.31 in. |
| April | 36.2 °F | 55.9 °F | 2.88 in. |
| May | 47.4 °F | 68.2 °F | 2.95 in. |
| June | 57.3 °F | 77.0 °F | 3.03 in. |
| July | 62.2 °F | 80.9 °F | 3.05 in. |
| August | 60.8 °F | 79.6 °F | 2.69 in. |
| September | 53.9 °F | 73.1 °F | 3.01 in. |
| October | 43.4 °F | 60.7 °F | 3.19 in. |
| November | 33.5 °F | 48.6 °F | 2.39 in. |
| December | 24.9 °F | 38.0 °F | 2.39 in. |
| Annual | 40.2 °F | 57.6 °F | 31.87 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |