Topsfield, Massachusetts has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.3 °F (low) to 59.4 °F (high). Annual precipitation averages 48.8 Inches. Topsfield is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.2 °F | 36.0 °F | 3.76 in. |
| February | 19.9 °F | 38.5 °F | 3.56 in. |
| March | 27.1 °F | 45.3 °F | 4.8 in. |
| April | 37.1 °F | 57.2 °F | 4.27 in. |
| May | 47.0 °F | 67.1 °F | 3.67 in. |
| June | 56.7 °F | 76.4 °F | 4.27 in. |
| July | 62.5 °F | 82.4 °F | 3.59 in. |
| August | 61.1 °F | 81.0 °F | 3.45 in. |
| September | 53.8 °F | 73.9 °F | 3.83 in. |
| October | 42.5 °F | 62.1 °F | 4.83 in. |
| November | 33.2 °F | 51.5 °F | 3.98 in. |
| December | 24.7 °F | 41.4 °F | 4.8 in. |
| Annual | 40.3 °F | 59.4 °F | 48.81 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |