Hope Valley, Rhode Island has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 5.6 °C (low) to 15.6 °C (high). Annual precipitation averages 1274.6 Millimeters. Hope Valley 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 | -6.2 °C | 3.4 °C | 102.11 mm |
| February | -5.4 °C | 4.6 °C | 89.92 mm |
| March | -1.4 °C | 8.4 °C | 130.3 mm |
| April | 3.7 °C | 14.1 °C | 118.87 mm |
| May | 9.3 °C | 19.6 °C | 89.92 mm |
| June | 14.6 °C | 24.7 °C | 98.81 mm |
| July | 17.8 °C | 27.4 °C | 84.58 mm |
| August | 16.9 °C | 26.7 °C | 100.33 mm |
| September | 12.9 °C | 23.2 °C | 105.16 mm |
| October | 6.9 °C | 17.2 °C | 122.43 mm |
| November | 1.4 °C | 11.6 °C | 106.68 mm |
| December | -2.9 °C | 6.4 °C | 125.48 mm |
| Annual | 5.6 °C | 15.6 °C | 1274.59 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |