Lysander, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.4 °C (low) to 13.8 °C (high). Annual precipitation averages 1121.7 Millimeters. Lysander 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 | -9.4 °C | -0.6 °C | 88.14 mm |
| February | -8.9 °C | 0.6 °C | 72.9 mm |
| March | -4.8 °C | 5 °C | 80.26 mm |
| April | 1.5 °C | 12.9 °C | 89.92 mm |
| May | 7.9 °C | 20.2 °C | 91.69 mm |
| June | 12.9 °C | 24.6 °C | 100.08 mm |
| July | 15.6 °C | 27.1 °C | 100.58 mm |
| August | 14.8 °C | 26.4 °C | 98.81 mm |
| September | 11 °C | 22.6 °C | 95.5 mm |
| October | 5.4 °C | 15.2 °C | 113.28 mm |
| November | 0.2 °C | 8.7 °C | 95.76 mm |
| December | -5.1 °C | 2.5 °C | 94.74 mm |
| Annual | 3.4 °C | 13.8 °C | 1121.66 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |