Ashaway, Rhode Island has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 42.1 °F (low) to 59.9 °F (high). Annual precipitation averages 48.9 Inches. Ashaway is located in USDA Plant Hardiness Zone 7a. 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 | 21.0 °F | 38.4 °F | 3.98 in. |
| February | 22.5 °F | 40.1 °F | 3.48 in. |
| March | 29.4 °F | 46.5 °F | 5.06 in. |
| April | 38.6 °F | 56.9 °F | 4.6 in. |
| May | 48.4 °F | 66.5 °F | 3.53 in. |
| June | 57.8 °F | 75.6 °F | 3.82 in. |
| July | 63.8 °F | 80.9 °F | 3.15 in. |
| August | 62.3 °F | 79.9 °F | 3.8 in. |
| September | 55.3 °F | 73.7 °F | 3.84 in. |
| October | 44.5 °F | 63.1 °F | 4.72 in. |
| November | 34.7 °F | 53.0 °F | 4.1 in. |
| December | 27.0 °F | 43.9 °F | 4.84 in. |
| Annual | 42.1 °F | 59.9 °F | 48.92 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |