Melrose, Massachusetts has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.4 °C (low) to 15.4 °C (high). Annual precipitation averages 1291.1 Millimeters. Melrose is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.8 °C | 2.6 °C | 103.63 mm |
| February | -5.9 °C | 3.9 °C | 95.25 mm |
| March | -2 °C | 7.4 °C | 125.22 mm |
| April | 3.7 °C | 14.1 °C | 111.76 mm |
| May | 9.1 °C | 19.7 °C | 94.49 mm |
| June | 14.4 °C | 24.8 °C | 109.22 mm |
| July | 17.7 °C | 28.1 °C | 98.3 mm |
| August | 16.9 °C | 27.2 °C | 95 mm |
| September | 12.9 °C | 23.2 °C | 100.58 mm |
| October | 6.6 °C | 16.9 °C | 126.24 mm |
| November | 1.4 °C | 11.1 °C | 106.17 mm |
| December | -3.3 °C | 5.6 °C | 125.22 mm |
| Annual | 5.4 °C | 15.4 °C | 1291.08 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |