Marblehead, Massachusetts has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6 °C (low) to 14.8 °C (high). Annual precipitation averages 1189.7 Millimeters. Marblehead is located in USDA Plant Hardiness Zone 7a. 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 | -5.8 °C | 2.7 °C | 93.98 mm |
| February | -4.9 °C | 3.7 °C | 88.14 mm |
| March | -1.4 °C | 7 °C | 119.63 mm |
| April | 3.8 °C | 13.2 °C | 101.09 mm |
| May | 9.1 °C | 18.4 °C | 88.39 mm |
| June | 14.4 °C | 23.7 °C | 104.14 mm |
| July | 17.7 °C | 27.1 °C | 88.39 mm |
| August | 17.1 °C | 26.4 °C | 82.55 mm |
| September | 13.6 °C | 22.6 °C | 87.38 mm |
| October | 7.8 °C | 16.4 °C | 119.63 mm |
| November | 2.5 °C | 10.7 °C | 99.31 mm |
| December | -2.3 °C | 5.7 °C | 117.09 mm |
| Annual | 6 °C | 14.8 °C | 1189.72 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |