Cambridge, Massachusetts has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.6 °C (low) to 15.6 °C (high). Annual precipitation averages 1271.5 Millimeters. Cambridge is located in USDA Plant Hardiness Zone 6b. 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 | -6.6 °C | 2.8 °C | 102.87 mm |
| February | -5.7 °C | 4.1 °C | 93.73 mm |
| March | -1.8 °C | 7.7 °C | 124.71 mm |
| April | 3.9 °C | 14.2 °C | 110.24 mm |
| May | 9.3 °C | 19.9 °C | 93.22 mm |
| June | 14.7 °C | 25.1 °C | 106.43 mm |
| July | 17.9 °C | 28.3 °C | 95 mm |
| August | 17.2 °C | 27.3 °C | 96.01 mm |
| September | 13.1 °C | 23.4 °C | 96.77 mm |
| October | 6.8 °C | 17.1 °C | 123.19 mm |
| November | 1.6 °C | 11.3 °C | 103.63 mm |
| December | -3.1 °C | 5.8 °C | 125.73 mm |
| Annual | 5.6 °C | 15.6 °C | 1271.53 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 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 |