Owls Head, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4 °C (low) to 11.6 °C (high). Annual precipitation averages 1301.5 Millimeters. Owls Head is located in USDA Plant Hardiness Zone 6a. 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 | -7.3 °C | 0.1 °C | 114.3 mm |
| February | -6.8 °C | 0.8 °C | 95.76 mm |
| March | -3.3 °C | 4.1 °C | 120.9 mm |
| April | 1.9 °C | 9.5 °C | 119.38 mm |
| May | 6.7 °C | 14.8 °C | 95 mm |
| June | 11.2 °C | 19.5 °C | 102.11 mm |
| July | 14.4 °C | 22.9 °C | 82.3 mm |
| August | 14.5 °C | 22.9 °C | 75.95 mm |
| September | 11.7 °C | 19.4 °C | 112.52 mm |
| October | 6.8 °C | 13.6 °C | 133.35 mm |
| November | 2.1 °C | 8.6 °C | 123.95 mm |
| December | -3.4 °C | 3.4 °C | 125.98 mm |
| Annual | 4 °C | 11.6 °C | 1301.5 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |