Millville, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.8 °F (low) to 59.8 °F (high). Annual precipitation averages 50.5 Inches. Millville is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.0 °F | 36.2 °F | 4.01 in. |
| February | 19.3 °F | 38.7 °F | 3.49 in. |
| March | 26.7 °F | 46.1 °F | 4.77 in. |
| April | 36.8 °F | 58.3 °F | 4.57 in. |
| May | 46.9 °F | 68.8 °F | 3.57 in. |
| June | 56.0 °F | 76.9 °F | 4.29 in. |
| July | 62.2 °F | 82.4 °F | 3.67 in. |
| August | 60.5 °F | 80.9 °F | 4.07 in. |
| September | 53.3 °F | 74.1 °F | 4.03 in. |
| October | 41.8 °F | 62.4 °F | 5.01 in. |
| November | 32.4 °F | 51.7 °F | 4.08 in. |
| December | 24.0 °F | 41.4 °F | 4.97 in. |
| Annual | 39.8 °F | 59.8 °F | 50.53 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |