Denmark, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.3 °C (low) to 11.9 °C (high). Annual precipitation averages 1206 Millimeters. Denmark is located in USDA Plant Hardiness Zone 4b. 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 | -12.9 °C | -2.9 °C | 107.19 mm |
| February | -12.3 °C | -1.8 °C | 79.25 mm |
| March | -7.3 °C | 3.1 °C | 77.72 mm |
| April | 0 °C | 10.8 °C | 91.44 mm |
| May | 6.8 °C | 18.5 °C | 98.04 mm |
| June | 11.7 °C | 22.8 °C | 97.03 mm |
| July | 14.3 °C | 25.3 °C | 97.28 mm |
| August | 13.5 °C | 24.9 °C | 102.87 mm |
| September | 9.2 °C | 21.1 °C | 104.39 mm |
| October | 3.4 °C | 13.9 °C | 133.1 mm |
| November | -2.3 °C | 6.7 °C | 108.71 mm |
| December | -8.4 °C | 0.3 °C | 108.97 mm |
| Annual | 1.3 °C | 11.9 °C | 1205.99 mm |
| 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 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |