Dayton, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.7 °C (low) to 13.6 °C (high). Annual precipitation averages 1251 Millimeters. Dayton is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.2 °C | -0.5 °C | 106.17 mm |
| February | -9.1 °C | 0.7 °C | 77.72 mm |
| March | -5.3 °C | 5.6 °C | 91.19 mm |
| April | 0.7 °C | 13.1 °C | 97.79 mm |
| May | 7 °C | 19.9 °C | 94.74 mm |
| June | 12.1 °C | 24.3 °C | 106.93 mm |
| July | 14.4 °C | 26.3 °C | 116.08 mm |
| August | 13.7 °C | 25.6 °C | 110.24 mm |
| September | 10.1 °C | 22 °C | 114.55 mm |
| October | 4.2 °C | 15.1 °C | 114.05 mm |
| November | -0.8 °C | 8.2 °C | 108.97 mm |
| December | -5.3 °C | 2.4 °C | 112.52 mm |
| Annual | 2.7 °C | 13.6 °C | 1250.95 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| 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 |