Vanceboro, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.1 °F (low) to 52.6 °F (high). Annual precipitation averages 47.7 Inches. 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 | 6.0 °F | 25.3 °F | 3.92 in. |
| February | 6.9 °F | 28.1 °F | 2.96 in. |
| March | 17.2 °F | 37.0 °F | 3.8 in. |
| April | 29.8 °F | 49.9 °F | 3.82 in. |
| May | 40.5 °F | 63.5 °F | 3.87 in. |
| June | 49.7 °F | 72.7 °F | 4.2 in. |
| July | 56.1 °F | 77.9 °F | 3.94 in. |
| August | 54.8 °F | 77.0 °F | 3.51 in. |
| September | 46.9 °F | 69.2 °F | 3.69 in. |
| October | 36.4 °F | 56.1 °F | 4.95 in. |
| November | 26.9 °F | 42.9 °F | 4.62 in. |
| December | 14.5 °F | 31.7 °F | 4.43 in. |
| Annual | 32.1 °F | 52.6 °F | 47.71 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |