Manchester-by-the-Sea, Massachusetts has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.1 °C (low) to 14.5 °C (high). Annual precipitation averages 1206.3 Millimeters. Manchester-by-the-Sea 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 | -5.4 °C | 2.6 °C | 97.54 mm |
| February | -4.8 °C | 3.6 °C | 90.17 mm |
| March | -1.3 °C | 6.6 °C | 118.87 mm |
| April | 3.8 °C | 12.8 °C | 104.65 mm |
| May | 9.1 °C | 18.1 °C | 90.68 mm |
| June | 14.4 °C | 23.3 °C | 103.12 mm |
| July | 17.7 °C | 26.5 °C | 88.9 mm |
| August | 17.2 °C | 26 °C | 84.33 mm |
| September | 13.7 °C | 22.3 °C | 91.95 mm |
| October | 8.1 °C | 16.2 °C | 118.11 mm |
| November | 2.8 °C | 10.6 °C | 98.04 mm |
| December | -2.1 °C | 5.7 °C | 119.89 mm |
| Annual | 6.1 °C | 14.5 °C | 1206.25 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |