DeRuyter, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2 °C (low) to 13.1 °C (high). Annual precipitation averages 1179.8 Millimeters. DeRuyter 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.7 °C | -0.9 °C | 79.76 mm |
| February | -10.1 °C | 0.3 °C | 67.82 mm |
| March | -6.2 °C | 4.7 °C | 87.88 mm |
| April | 0.4 °C | 12.2 °C | 99.82 mm |
| May | 6.6 °C | 19.3 °C | 101.35 mm |
| June | 11.7 °C | 23.8 °C | 115.06 mm |
| July | 14.1 °C | 26.2 °C | 117.6 mm |
| August | 13.3 °C | 25.4 °C | 111 mm |
| September | 9.3 °C | 21.8 °C | 110.49 mm |
| October | 3.6 °C | 14.7 °C | 110.24 mm |
| November | -1.6 °C | 7.9 °C | 88.65 mm |
| December | -6.4 °C | 1.8 °C | 90.17 mm |
| Annual | 2 °C | 13.1 °C | 1179.84 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |