Medford, Massachusetts has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.7 °F (low) to 59.9 °F (high). Annual precipitation averages 50.6 Inches. Medford 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 | 19.6 °F | 36.8 °F | 4.1 in. |
| February | 21.2 °F | 39.3 °F | 3.74 in. |
| March | 28.4 °F | 45.7 °F | 4.95 in. |
| April | 38.6 °F | 57.5 °F | 4.38 in. |
| May | 48.5 °F | 67.7 °F | 3.7 in. |
| June | 58.0 °F | 76.9 °F | 4.25 in. |
| July | 63.9 °F | 82.8 °F | 3.82 in. |
| August | 62.5 °F | 81.2 °F | 3.8 in. |
| September | 55.2 °F | 74.1 °F | 3.91 in. |
| October | 43.9 °F | 62.7 °F | 4.91 in. |
| November | 34.5 °F | 52.2 °F | 4.13 in. |
| December | 26.0 °F | 42.3 °F | 4.94 in. |
| Annual | 41.7 °F | 59.9 °F | 50.63 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |