Denmark, Maine has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from 0.9 °C (low) to 13.2 °C (high). Annual precipitation averages 1286.3 Millimeters. Denmark is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.1 °C | -1.3 °C | 88.65 mm |
| February | -12.6 °C | 0.4 °C | 89.92 mm |
| March | -6.9 °C | 5.1 °C | 103.63 mm |
| April | -0.4 °C | 12.4 °C | 110.49 mm |
| May | 5.8 °C | 19.3 °C | 96.01 mm |
| June | 11.3 °C | 23.8 °C | 120.4 mm |
| July | 14.3 °C | 26.8 °C | 109.22 mm |
| August | 13.2 °C | 26.2 °C | 100.84 mm |
| September | 8.8 °C | 21.9 °C | 99.31 mm |
| October | 2.6 °C | 14.7 °C | 139.7 mm |
| November | -2.9 °C | 7.7 °C | 113.03 mm |
| December | -8.8 °C | 1.7 °C | 115.06 mm |
| Annual | 0.9 °C | 13.2 °C | 1286.26 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |