Sterling, Virginia has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.4 °C (low) to 19 °C (high). Annual precipitation averages 1132.3 Millimeters. Sterling 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4 °C | 6.1 °C | 77.47 mm |
| February | -3.2 °C | 7.9 °C | 67.06 mm |
| March | 0.7 °C | 12.6 °C | 95.5 mm |
| April | 6.3 °C | 19.2 °C | 85.34 mm |
| May | 11.6 °C | 23.8 °C | 114.55 mm |
| June | 16.7 °C | 28.4 °C | 111.76 mm |
| July | 19.4 °C | 31 °C | 107.44 mm |
| August | 18.4 °C | 30.1 °C | 90.93 mm |
| September | 14.7 °C | 26.3 °C | 108.97 mm |
| October | 7.6 °C | 19.9 °C | 99.06 mm |
| November | 1.8 °C | 13.8 °C | 82.8 mm |
| December | -1.8 °C | 8.3 °C | 91.44 mm |
| Annual | 7.4 °C | 19 °C | 1132.32 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |