Cranston, Rhode Island has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.6 °F (low) to 60.3 °F (high). Annual precipitation averages 51.6 Inches. Cranston is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.0 °F | 37.9 °F | 4.22 in. |
| February | 23.2 °F | 39.7 °F | 3.77 in. |
| March | 30.2 °F | 46.5 °F | 5.13 in. |
| April | 40.2 °F | 57.5 °F | 4.94 in. |
| May | 49.9 °F | 68.1 °F | 3.52 in. |
| June | 59.6 °F | 76.4 °F | 4.38 in. |
| July | 65.9 °F | 82.5 °F | 3.4 in. |
| August | 64.4 °F | 81.1 °F | 3.92 in. |
| September | 57.5 °F | 74.3 °F | 4.26 in. |
| October | 46.3 °F | 63.2 °F | 4.71 in. |
| November | 36.4 °F | 52.8 °F | 4.43 in. |
| December | 28.0 °F | 43.2 °F | 4.96 in. |
| Annual | 43.6 °F | 60.3 °F | 51.64 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |