Woonsocket, Rhode Island has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.9 °C (low) to 15.9 °C (high). Annual precipitation averages 1297.2 Millimeters. Woonsocket 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.3 °C | 2.8 °C | 104.39 mm |
| February | -6.4 °C | 4.2 °C | 90.17 mm |
| March | -2.4 °C | 8.2 °C | 122.68 mm |
| April | 3.2 °C | 14.8 °C | 117.6 mm |
| May | 8.7 °C | 20.6 °C | 91.44 mm |
| June | 13.9 °C | 25.3 °C | 109.47 mm |
| July | 17.3 °C | 28.4 °C | 92.46 mm |
| August | 16.4 °C | 27.7 °C | 102.62 mm |
| September | 12.3 °C | 23.8 °C | 103.89 mm |
| October | 5.8 °C | 17.4 °C | 128.52 mm |
| November | 0.7 °C | 11.3 °C | 105.16 mm |
| December | -3.9 °C | 5.7 °C | 128.78 mm |
| Annual | 4.9 °C | 15.9 °C | 1297.18 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |