Essex, Massachusetts has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.6 °F (low) to 58.4 °F (high). Annual precipitation averages 48.8 Inches. Essex 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 Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.9 °F | 36.1 °F | 3.85 in. |
| February | 21.5 °F | 38.2 °F | 3.6 in. |
| March | 28.4 °F | 44.5 °F | 4.84 in. |
| April | 37.9 °F | 55.8 °F | 4.26 in. |
| May | 47.7 °F | 65.2 °F | 3.64 in. |
| June | 57.4 °F | 74.5 °F | 4.27 in. |
| July | 63.2 °F | 80.7 °F | 3.53 in. |
| August | 62.2 °F | 79.4 °F | 3.41 in. |
| September | 55.1 °F | 72.3 °F | 3.77 in. |
| October | 44.2 °F | 61.3 °F | 4.78 in. |
| November | 34.9 °F | 51.0 °F | 4.0 in. |
| December | 26.3 °F | 41.6 °F | 4.87 in. |
| Annual | 41.6 °F | 58.4 °F | 48.82 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 |