Lee, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36 °F (low) to 57.6 °F (high). Annual precipitation averages 48 Inches. Lee is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.2 °F | 32.1 °F | 3.51 in. |
| February | 14.6 °F | 35.2 °F | 2.99 in. |
| March | 22.8 °F | 43.1 °F | 3.47 in. |
| April | 33.3 °F | 57.1 °F | 3.63 in. |
| May | 44.1 °F | 68.9 °F | 3.93 in. |
| June | 53.2 °F | 76.6 °F | 4.75 in. |
| July | 58.1 °F | 81.4 °F | 4.58 in. |
| August | 56.8 °F | 79.4 °F | 4.31 in. |
| September | 48.8 °F | 72.5 °F | 4.28 in. |
| October | 37.9 °F | 60.0 °F | 4.81 in. |
| November | 29.0 °F | 48.2 °F | 3.45 in. |
| December | 20.6 °F | 37.2 °F | 4.25 in. |
| Annual | 36 °F | 57.6 °F | 47.96 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |