Hancock, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.9 °C (low) to 12.4 °C (high). Annual precipitation averages 1261.4 Millimeters. Hancock is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.6 °C | -1.2 °C | 104.9 mm |
| February | -10.6 °C | 0.2 °C | 88.65 mm |
| March | -5.4 °C | 4.3 °C | 109.73 mm |
| April | 0.3 °C | 10.8 °C | 109.73 mm |
| May | 5.8 °C | 16.9 °C | 101.09 mm |
| June | 10.8 °C | 21.9 °C | 101.85 mm |
| July | 14.3 °C | 25.2 °C | 82.8 mm |
| August | 13.7 °C | 24.9 °C | 75.95 mm |
| September | 9.8 °C | 20.9 °C | 97.54 mm |
| October | 4.1 °C | 14.3 °C | 135.64 mm |
| November | -1 °C | 7.9 °C | 127 mm |
| December | -7.1 °C | 2.2 °C | 126.49 mm |
| Annual | 1.9 °C | 12.4 °C | 1261.37 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |