Quonochontaug, Rhode Island has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 44.9 °F (low) to 58.7 °F (high). Annual precipitation averages 47.7 Inches. Quonochontaug 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 | 24.5 °F | 38.7 °F | 4.0 in. |
| February | 25.6 °F | 40.0 °F | 3.53 in. |
| March | 31.5 °F | 45.5 °F | 5.1 in. |
| April | 40.4 °F | 54.4 °F | 4.51 in. |
| May | 49.2 °F | 63.4 °F | 3.4 in. |
| June | 58.9 °F | 72.4 °F | 3.64 in. |
| July | 65.3 °F | 78.6 °F | 2.94 in. |
| August | 64.9 °F | 77.8 °F | 3.6 in. |
| September | 59.2 °F | 72.5 °F | 3.52 in. |
| October | 48.9 °F | 62.7 °F | 4.61 in. |
| November | 39.1 °F | 53.3 °F | 4.07 in. |
| December | 31.2 °F | 44.5 °F | 4.79 in. |
| Annual | 44.9 °F | 58.7 °F | 47.71 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 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |