Weekapaug, Rhode Island has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 7.1 °C (low) to 14.9 °C (high). Annual precipitation averages 1205.2 Millimeters. Weekapaug 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 | -4.2 °C | 3.6 °C | 100.58 mm |
| February | -3.6 °C | 4.3 °C | 88.39 mm |
| March | -0.3 °C | 7.4 °C | 127.51 mm |
| April | 4.6 °C | 12.7 °C | 114.55 mm |
| May | 9.5 °C | 17.7 °C | 86.61 mm |
| June | 14.8 °C | 22.7 °C | 93.73 mm |
| July | 18.5 °C | 26.2 °C | 74.68 mm |
| August | 18.3 °C | 25.7 °C | 90.42 mm |
| September | 15.1 °C | 22.7 °C | 87.88 mm |
| October | 9.4 °C | 17.1 °C | 117.09 mm |
| November | 4.1 °C | 11.8 °C | 102.62 mm |
| December | -0.6 °C | 6.9 °C | 121.16 mm |
| Annual | 7.1 °C | 14.9 °C | 1205.22 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |