Copenhagen, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34 °F (low) to 52.9 °F (high). Annual precipitation averages 51.2 Inches. Copenhagen 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 | 8.7 °F | 26.3 °F | 4.89 in. |
| February | 9.8 °F | 28.5 °F | 3.61 in. |
| March | 18.5 °F | 37.1 °F | 3.34 in. |
| April | 31.7 °F | 51.0 °F | 3.81 in. |
| May | 43.9 °F | 65.0 °F | 4.05 in. |
| June | 52.5 °F | 72.4 °F | 3.61 in. |
| July | 57.1 °F | 76.9 °F | 3.98 in. |
| August | 55.7 °F | 76.3 °F | 4.21 in. |
| September | 48.0 °F | 69.5 °F | 4.37 in. |
| October | 37.9 °F | 56.7 °F | 5.63 in. |
| November | 27.5 °F | 43.5 °F | 4.81 in. |
| December | 16.4 °F | 32.1 °F | 4.85 in. |
| Annual | 34 °F | 52.9 °F | 51.16 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |