Leon, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.1 °F (low) to 55.5 °F (high). Annual precipitation averages 48.4 Inches. Leon is located in USDA Plant Hardiness Zone 5b. 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 | 15.0 °F | 30.3 °F | 3.9 in. |
| February | 15.1 °F | 32.5 °F | 2.78 in. |
| March | 21.6 °F | 41.1 °F | 3.44 in. |
| April | 32.6 °F | 54.6 °F | 3.81 in. |
| May | 43.8 °F | 66.8 °F | 3.79 in. |
| June | 52.9 °F | 74.7 °F | 4.46 in. |
| July | 56.9 °F | 78.4 °F | 4.91 in. |
| August | 55.7 °F | 77.0 °F | 4.41 in. |
| September | 49.2 °F | 70.7 °F | 4.4 in. |
| October | 38.8 °F | 58.3 °F | 4.39 in. |
| November | 29.5 °F | 45.9 °F | 4.04 in. |
| December | 22.0 °F | 35.5 °F | 4.07 in. |
| Annual | 36.1 °F | 55.5 °F | 48.4 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 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |