Sandston, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.8 °C (low) to 20.7 °C (high). Annual precipitation averages 1188 Millimeters. Sandston is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.3 °C | 8.9 °C | 82.8 mm |
| February | -1.6 °C | 10.8 °C | 72.14 mm |
| March | 2.3 °C | 15.1 °C | 113.03 mm |
| April | 7.9 °C | 21.1 °C | 88.39 mm |
| May | 13.3 °C | 25.1 °C | 101.6 mm |
| June | 18.1 °C | 29.4 °C | 112.27 mm |
| July | 20.5 °C | 31.7 °C | 115.57 mm |
| August | 19.6 °C | 30.7 °C | 124.71 mm |
| September | 16.1 °C | 27.3 °C | 116.08 mm |
| October | 9.2 °C | 21.4 °C | 86.11 mm |
| November | 3.1 °C | 15.8 °C | 84.33 mm |
| December | -0.6 °C | 10.8 °C | 90.93 mm |
| Annual | 8.8 °C | 20.7 °C | 1187.96 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |