Tiverton, Rhode Island has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.9 °C (low) to 15.6 °C (high). Annual precipitation averages 1256.5 Millimeters. Tiverton 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 | -4.7 °C | 3.6 °C | 107.44 mm |
| February | -4.2 °C | 4.4 °C | 93.98 mm |
| March | -0.7 °C | 8 °C | 139.45 mm |
| April | 4.8 °C | 13.8 °C | 117.6 mm |
| May | 10.1 °C | 19.4 °C | 86.11 mm |
| June | 15.4 °C | 24.3 °C | 96.52 mm |
| July | 19.1 °C | 27.6 °C | 81.53 mm |
| August | 18.2 °C | 26.9 °C | 90.68 mm |
| September | 14.8 °C | 23.4 °C | 94.74 mm |
| October | 8.4 °C | 17.2 °C | 117.35 mm |
| November | 3.5 °C | 11.6 °C | 104.39 mm |
| December | -1.4 °C | 6.6 °C | 126.75 mm |
| Annual | 6.9 °C | 15.6 °C | 1256.54 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |