Poquoson, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.1 °C (low) to 20.2 °C (high). Annual precipitation averages 1273.6 Millimeters. Poquoson is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.1 °C | 9.2 °C | 92.71 mm |
| February | 1.8 °C | 10.7 °C | 75.44 mm |
| March | 5.2 °C | 14.2 °C | 98.3 mm |
| April | 10.6 °C | 19.8 °C | 88.14 mm |
| May | 15.7 °C | 24 °C | 101.85 mm |
| June | 20.6 °C | 28.3 °C | 114.55 mm |
| July | 23.1 °C | 30.8 °C | 130.56 mm |
| August | 22.4 °C | 29.6 °C | 147.32 mm |
| September | 19.7 °C | 26.7 °C | 129.03 mm |
| October | 13.6 °C | 21.4 °C | 117.09 mm |
| November | 7.4 °C | 15.8 °C | 86.36 mm |
| December | 3.6 °C | 11.5 °C | 92.2 mm |
| Annual | 12.1 °C | 20.2 °C | 1273.55 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |