Halifax, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40.7 °F (low) to 60.5 °F (high). Annual precipitation averages 52.5 Inches. Halifax is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.8 °F | 37.9 °F | 4.39 in. |
| February | 20.9 °F | 40.0 °F | 3.92 in. |
| March | 27.8 °F | 46.7 °F | 5.62 in. |
| April | 37.2 °F | 57.9 °F | 4.74 in. |
| May | 47.0 °F | 68.1 °F | 3.69 in. |
| June | 56.3 °F | 77.2 °F | 3.92 in. |
| July | 62.6 °F | 83.0 °F | 3.52 in. |
| August | 61.0 °F | 81.6 °F | 3.67 in. |
| September | 53.9 °F | 74.6 °F | 4.1 in. |
| October | 42.8 °F | 63.2 °F | 5.08 in. |
| November | 33.5 °F | 52.9 °F | 4.64 in. |
| December | 25.4 °F | 43.4 °F | 5.23 in. |
| Annual | 40.7 °F | 60.5 °F | 52.52 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |