Lancaster, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.6 °F (low) to 56.8 °F (high). Annual precipitation averages 42.1 Inches. Lancaster 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 | 17.9 °F | 32.3 °F | 3.33 in. |
| February | 18.2 °F | 33.5 °F | 2.5 in. |
| March | 25.0 °F | 41.7 °F | 3.19 in. |
| April | 35.7 °F | 54.8 °F | 3.38 in. |
| May | 47.0 °F | 67.1 °F | 3.31 in. |
| June | 56.7 °F | 75.6 °F | 3.94 in. |
| July | 61.3 °F | 79.9 °F | 3.47 in. |
| August | 60.2 °F | 79.1 °F | 3.35 in. |
| September | 53.0 °F | 72.7 °F | 4.17 in. |
| October | 42.4 °F | 60.0 °F | 4.14 in. |
| November | 32.9 °F | 47.9 °F | 3.81 in. |
| December | 24.5 °F | 37.5 °F | 3.54 in. |
| Annual | 39.6 °F | 56.8 °F | 42.13 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 |