Warren, Rhode Island has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.8 °C (low) to 15.6 °C (high). Annual precipitation averages 1288.6 Millimeters. Warren 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 | -5.2 °C | 3.4 °C | 108.2 mm |
| February | -4.4 °C | 4.3 °C | 93.47 mm |
| March | -0.8 °C | 8.1 °C | 135.89 mm |
| April | 4.7 °C | 14 °C | 119.13 mm |
| May | 10 °C | 19.8 °C | 88.65 mm |
| June | 15.4 °C | 24.6 °C | 103.38 mm |
| July | 19.1 °C | 27.9 °C | 86.61 mm |
| August | 18.6 °C | 27.1 °C | 95 mm |
| September | 14.6 °C | 23.4 °C | 102.11 mm |
| October | 8.6 °C | 17.2 °C | 119.89 mm |
| November | 2.9 °C | 11.5 °C | 110.74 mm |
| December | -1.5 °C | 6.4 °C | 125.48 mm |
| Annual | 6.8 °C | 15.6 °C | 1288.55 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 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 |