Nahant, 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 14.9 °C (high). Annual precipitation averages 1221.5 Millimeters. Nahant is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.7 °C | 2.8 °C | 98.3 mm |
| February | -4.8 °C | 3.9 °C | 91.44 mm |
| March | -1.2 °C | 7.1 °C | 122.43 mm |
| April | 4 °C | 13.2 °C | 106.43 mm |
| May | 9.3 °C | 18.6 °C | 88.65 mm |
| June | 14.6 °C | 23.8 °C | 102.62 mm |
| July | 17.9 °C | 27.2 °C | 89.15 mm |
| August | 17.3 °C | 26.4 °C | 87.12 mm |
| September | 13.7 °C | 22.7 °C | 91.19 mm |
| October | 7.9 °C | 16.6 °C | 121.67 mm |
| November | 2.7 °C | 10.9 °C | 102.11 mm |
| December | -2.3 °C | 5.9 °C | 120.4 mm |
| Annual | 6.1 °C | 14.9 °C | 1221.51 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 |