Clayville, Rhode Island has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.6 °C (low) to 15.2 °C (high). Annual precipitation averages 1310.9 Millimeters. Clayville 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.3 °C | 2.3 °C | 102.62 mm |
| February | -6.6 °C | 3.6 °C | 90.42 mm |
| March | -2.8 °C | 7.7 °C | 125.98 mm |
| April | 2.8 °C | 14.4 °C | 118.36 mm |
| May | 8.3 °C | 20.3 °C | 91.95 mm |
| June | 13.4 °C | 24.6 °C | 107.95 mm |
| July | 16.9 °C | 27.8 °C | 93.98 mm |
| August | 16 °C | 26.6 °C | 108.97 mm |
| September | 12.2 °C | 22.7 °C | 106.17 mm |
| October | 6.1 °C | 16.4 °C | 128.78 mm |
| November | 0.5 °C | 10.6 °C | 108.46 mm |
| December | -4.1 °C | 5.1 °C | 127.25 mm |
| Annual | 4.6 °C | 15.2 °C | 1310.89 mm |
| 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |