Foxborough, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.6 °C (low) to 15.4 °C (high). Annual precipitation averages 1289 Millimeters. 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 | -7.6 °C | 2.4 °C | 104.65 mm |
| February | -6.7 °C | 3.8 °C | 91.19 mm |
| March | -2.7 °C | 7.7 °C | 127.25 mm |
| April | 2.9 °C | 14.3 °C | 119.63 mm |
| May | 8.4 °C | 20.1 °C | 90.42 mm |
| June | 13.6 °C | 24.8 °C | 104.65 mm |
| July | 16.9 °C | 27.9 °C | 89.15 mm |
| August | 16.2 °C | 27.1 °C | 99.31 mm |
| September | 12.1 °C | 23.2 °C | 102.36 mm |
| October | 5.7 °C | 16.7 °C | 129.79 mm |
| November | 0.6 °C | 10.9 °C | 109.73 mm |
| December | -4.1 °C | 5.3 °C | 120.9 mm |
| Annual | 4.6 °C | 15.4 °C | 1289.03 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |