Vanceboro, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.1 °C (low) to 11.5 °C (high). Annual precipitation averages 1211.8 Millimeters. Vanceboro is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.4 °C | -3.7 °C | 99.57 mm |
| February | -13.9 °C | -2.2 °C | 75.18 mm |
| March | -8.2 °C | 2.8 °C | 96.52 mm |
| April | -1.2 °C | 9.9 °C | 97.03 mm |
| May | 4.7 °C | 17.5 °C | 98.3 mm |
| June | 9.8 °C | 22.6 °C | 106.68 mm |
| July | 13.4 °C | 25.5 °C | 100.08 mm |
| August | 12.7 °C | 25 °C | 89.15 mm |
| September | 8.3 °C | 20.7 °C | 93.73 mm |
| October | 2.4 °C | 13.4 °C | 125.73 mm |
| November | -2.8 °C | 6.1 °C | 117.35 mm |
| December | -9.7 °C | -0.2 °C | 112.52 mm |
| Annual | 0.1 °C | 11.5 °C | 1211.84 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |