Bristol, 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 1271.3 Millimeters. Bristol 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.9 °C | 3.3 °C | 107.7 mm |
| February | -4.3 °C | 4.3 °C | 93.73 mm |
| March | -0.8 °C | 8.2 °C | 138.68 mm |
| April | 4.7 °C | 14 °C | 118.11 mm |
| May | 9.9 °C | 19.7 °C | 87.12 mm |
| June | 15.3 °C | 24.5 °C | 99.06 mm |
| July | 19 °C | 27.8 °C | 83.57 mm |
| August | 18.3 °C | 27.2 °C | 92.96 mm |
| September | 14.7 °C | 23.5 °C | 98.04 mm |
| October | 8.5 °C | 17.2 °C | 118.87 mm |
| November | 3.2 °C | 11.3 °C | 107.19 mm |
| December | -1.4 °C | 6.3 °C | 126.24 mm |
| Annual | 6.9 °C | 15.6 °C | 1271.27 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |