North Brookfield, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.7 °F (low) to 57 °F (high). Annual precipitation averages 48.6 Inches. North Brookfield is located in USDA Plant Hardiness Zone 6a. 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 | 15.2 °F | 32.5 °F | 3.67 in. |
| February | 16.2 °F | 35.1 °F | 3.26 in. |
| March | 24.0 °F | 42.9 °F | 4.2 in. |
| April | 34.8 °F | 55.7 °F | 3.98 in. |
| May | 45.5 °F | 66.6 °F | 3.63 in. |
| June | 54.6 °F | 75.0 °F | 4.23 in. |
| July | 60.3 °F | 80.3 °F | 4.12 in. |
| August | 58.7 °F | 78.6 °F | 4.38 in. |
| September | 51.1 °F | 71.4 °F | 4.32 in. |
| October | 39.7 °F | 59.3 °F | 4.81 in. |
| November | 30.7 °F | 48.2 °F | 3.71 in. |
| December | 21.8 °F | 37.9 °F | 4.33 in. |
| Annual | 37.7 °F | 57 °F | 48.64 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 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |