West Warwick, Rhode Island has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 5.8 °C (low) to 15.6 °C (high). Annual precipitation averages 1291.1 Millimeters. West Warwick is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.3 °C | 2.9 °C | 104.14 mm |
| February | -5.5 °C | 4.1 °C | 91.95 mm |
| March | -1.7 °C | 8.1 °C | 131.06 mm |
| April | 3.8 °C | 14.3 °C | 120.9 mm |
| May | 9.4 °C | 20.1 °C | 89.66 mm |
| June | 14.7 °C | 24.9 °C | 105.16 mm |
| July | 18.2 °C | 28.1 °C | 86.87 mm |
| August | 17.4 °C | 27.2 °C | 99.06 mm |
| September | 13.4 °C | 23.3 °C | 104.65 mm |
| October | 7.2 °C | 17.1 °C | 121.41 mm |
| November | 1.7 °C | 11.2 °C | 111 mm |
| December | -2.9 °C | 5.8 °C | 125.22 mm |
| Annual | 5.8 °C | 15.6 °C | 1291.08 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |