Leicester, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.1 °F (low) to 58.1 °F (high). Annual precipitation averages 33.3 Inches. Leicester is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.1 °F | 32.8 °F | 1.9 in. |
| February | 17.7 °F | 34.6 °F | 1.53 in. |
| March | 24.9 °F | 42.8 °F | 2.06 in. |
| April | 35.8 °F | 56.4 °F | 2.72 in. |
| May | 47.3 °F | 69.2 °F | 3.01 in. |
| June | 56.5 °F | 77.7 °F | 3.54 in. |
| July | 60.7 °F | 81.7 °F | 4.17 in. |
| August | 59.4 °F | 80.2 °F | 3.45 in. |
| September | 52.0 °F | 73.8 °F | 3.02 in. |
| October | 41.7 °F | 61.2 °F | 3.26 in. |
| November | 32.3 °F | 48.6 °F | 2.52 in. |
| December | 24.1 °F | 38.1 °F | 2.13 in. |
| Annual | 39.1 °F | 58.1 °F | 33.31 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°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 |