Hancock, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.5 °F (low) to 54.2 °F (high). Annual precipitation averages 49.7 Inches. 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 | 11.2 °F | 29.8 °F | 4.13 in. |
| February | 13.0 °F | 32.3 °F | 3.49 in. |
| March | 22.2 °F | 39.7 °F | 4.32 in. |
| April | 32.5 °F | 51.4 °F | 4.32 in. |
| May | 42.4 °F | 62.4 °F | 3.98 in. |
| June | 51.4 °F | 71.5 °F | 4.01 in. |
| July | 57.7 °F | 77.3 °F | 3.26 in. |
| August | 56.6 °F | 76.9 °F | 2.99 in. |
| September | 49.6 °F | 69.7 °F | 3.84 in. |
| October | 39.4 °F | 57.7 °F | 5.34 in. |
| November | 30.2 °F | 46.3 °F | 5.0 in. |
| December | 19.2 °F | 35.9 °F | 4.98 in. |
| Annual | 35.5 °F | 54.2 °F | 49.66 in. |
| 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 : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |