Genoa, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.7 °C (low) to 13.8 °C (high). Annual precipitation averages 1003.6 Millimeters. Genoa 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 | -9.2 °C | -0.6 °C | 59.94 mm |
| February | -8.1 °C | 0.9 °C | 52.07 mm |
| March | -4.3 °C | 5.3 °C | 71.37 mm |
| April | 1.8 °C | 12.8 °C | 88.9 mm |
| May | 8.2 °C | 19.9 °C | 84.33 mm |
| June | 13.3 °C | 24.6 °C | 101.35 mm |
| July | 15.9 °C | 26.9 °C | 102.62 mm |
| August | 15.1 °C | 26.2 °C | 95.5 mm |
| September | 11.2 °C | 22.6 °C | 100.84 mm |
| October | 5.5 °C | 15.4 °C | 98.04 mm |
| November | 0.2 °C | 8.7 °C | 78.49 mm |
| December | -4.7 °C | 2.7 °C | 70.1 mm |
| Annual | 3.7 °C | 13.8 °C | 1003.55 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |