Foxborough, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40.3 °F (low) to 59.6 °F (high). Annual precipitation averages 50.8 Inches. Foxborough is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.4 °F | 36.4 °F | 4.12 in. |
| February | 19.9 °F | 38.8 °F | 3.59 in. |
| March | 27.2 °F | 45.9 °F | 5.01 in. |
| April | 37.3 °F | 57.8 °F | 4.71 in. |
| May | 47.2 °F | 68.1 °F | 3.56 in. |
| June | 56.5 °F | 76.6 °F | 4.12 in. |
| July | 62.5 °F | 82.3 °F | 3.51 in. |
| August | 61.1 °F | 80.8 °F | 3.91 in. |
| September | 53.8 °F | 73.8 °F | 4.03 in. |
| October | 42.3 °F | 62.0 °F | 5.11 in. |
| November | 33.0 °F | 51.6 °F | 4.32 in. |
| December | 24.7 °F | 41.6 °F | 4.76 in. |
| Annual | 40.3 °F | 59.6 °F | 50.75 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 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 | Dfb - Humid Continental Mild Summer, Wet All Year |