Poquonock Bridge, Connecticut has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 6.3 °C (low) to 15.1 °C (high). Annual precipitation averages 1189.7 Millimeters. Poquonock Bridge 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 | -5.3 °C | 3.6 °C | 96.27 mm |
| February | -4.7 °C | 4.4 °C | 80.26 mm |
| March | -0.8 °C | 7.9 °C | 120.65 mm |
| April | 4.2 °C | 13.2 °C | 111 mm |
| May | 9.3 °C | 18.2 °C | 90.17 mm |
| June | 14.6 °C | 23.2 °C | 93.22 mm |
| July | 18.2 °C | 26.4 °C | 77.47 mm |
| August | 17.6 °C | 25.9 °C | 95.5 mm |
| September | 13.7 °C | 22.8 °C | 101.09 mm |
| October | 8.1 °C | 17.2 °C | 113.54 mm |
| November | 2.9 °C | 11.8 °C | 95.25 mm |
| December | -1.8 °C | 6.8 °C | 115.32 mm |
| Annual | 6.3 °C | 15.1 °C | 1189.74 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |