Lubec, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.6 °C (low) to 10.9 °C (high). Annual precipitation averages 1212.1 Millimeters. Lubec 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 | -9.3 °C | -0.6 °C | 102.87 mm |
| February | -8.6 °C | -0.1 °C | 84.58 mm |
| March | -4.2 °C | 3.3 °C | 104.65 mm |
| April | 1.3 °C | 8.6 °C | 102.87 mm |
| May | 5.6 °C | 13.7 °C | 91.69 mm |
| June | 9.3 °C | 18.8 °C | 102.62 mm |
| July | 11.8 °C | 21.7 °C | 75.44 mm |
| August | 12.7 °C | 22.1 °C | 82.3 mm |
| September | 10.5 °C | 18.9 °C | 96.27 mm |
| October | 5.8 °C | 13.3 °C | 127 mm |
| November | 0.9 °C | 7.9 °C | 114.81 mm |
| December | -4.8 °C | 3 °C | 127 mm |
| Annual | 2.6 °C | 10.9 °C | 1212.1 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |