Lenox, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.2 °F (low) to 56.1 °F (high). Annual precipitation averages 48.9 Inches. Lenox 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 | 12.3 °F | 30.8 °F | 3.56 in. |
| February | 13.6 °F | 33.9 °F | 3.09 in. |
| March | 21.5 °F | 41.9 °F | 3.55 in. |
| April | 32.3 °F | 55.3 °F | 3.66 in. |
| May | 43.2 °F | 67.1 °F | 3.94 in. |
| June | 52.4 °F | 74.8 °F | 4.82 in. |
| July | 57.3 °F | 79.5 °F | 4.6 in. |
| August | 55.9 °F | 77.5 °F | 4.43 in. |
| September | 48.5 °F | 70.8 °F | 4.46 in. |
| October | 37.7 °F | 58.3 °F | 4.91 in. |
| November | 28.2 °F | 46.9 °F | 3.53 in. |
| December | 19.6 °F | 35.9 °F | 4.34 in. |
| Annual | 35.2 °F | 56.1 °F | 48.89 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 |