Kingston, Rhode Island has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 42 °F (low) to 59.3 °F (high). Annual precipitation averages 51.9 Inches. Kingston is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.6 °F | 37.7 °F | 4.2 in. |
| February | 22.6 °F | 39.3 °F | 3.73 in. |
| March | 28.5 °F | 46.2 °F | 5.51 in. |
| April | 37.4 °F | 56.7 °F | 4.84 in. |
| May | 47.2 °F | 66.5 °F | 3.71 in. |
| June | 56.4 °F | 75.8 °F | 4.03 in. |
| July | 62.3 °F | 80.2 °F | 3.26 in. |
| August | 61.5 °F | 79.1 °F | 4.08 in. |
| September | 55.9 °F | 73.0 °F | 4.1 in. |
| October | 45.9 °F | 62.1 °F | 4.92 in. |
| November | 36.4 °F | 52.2 °F | 4.39 in. |
| December | 28.1 °F | 43.2 °F | 5.1 in. |
| Annual | 42 °F | 59.3 °F | 51.87 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 |