Newport, Rhode Island has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7 °C (low) to 15 °C (high). Annual precipitation averages 1198.9 Millimeters. Newport 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 | -4.4 °C | 3.8 °C | 99.82 mm |
| February | -3.9 °C | 4.6 °C | 89.41 mm |
| March | -0.4 °C | 7.5 °C | 129.54 mm |
| April | 4.5 °C | 12.6 °C | 114.55 mm |
| May | 9.6 °C | 17.8 °C | 87.38 mm |
| June | 14.9 °C | 22.6 °C | 89.92 mm |
| July | 18.6 °C | 26 °C | 76.96 mm |
| August | 18.1 °C | 26 °C | 85.6 mm |
| September | 14.8 °C | 22.7 °C | 92.46 mm |
| October | 9 °C | 17.2 °C | 111.76 mm |
| November | 3.8 °C | 11.7 °C | 101.09 mm |
| December | -1.2 °C | 6.9 °C | 120.4 mm |
| Annual | 7 °C | 15 °C | 1198.89 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |