Haverhill, Massachusetts has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.2 °F (low) to 59.6 °F (high). Annual precipitation averages 48.1 Inches. Haverhill is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.8 °F | 35.4 °F | 3.56 in. |
| February | 18.6 °F | 38.1 °F | 3.52 in. |
| March | 26.0 °F | 45.4 °F | 4.68 in. |
| April | 36.3 °F | 57.7 °F | 4.16 in. |
| May | 46.5 °F | 68.0 °F | 3.77 in. |
| June | 56.0 °F | 77.2 °F | 4.27 in. |
| July | 61.9 °F | 83.1 °F | 3.54 in. |
| August | 60.2 °F | 81.6 °F | 3.43 in. |
| September | 52.6 °F | 74.3 °F | 3.8 in. |
| October | 40.9 °F | 62.2 °F | 4.96 in. |
| November | 31.8 °F | 51.2 °F | 3.81 in. |
| December | 23.3 °F | 40.9 °F | 4.61 in. |
| Annual | 39.2 °F | 59.6 °F | 48.11 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |