Sugar Grove, Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.9 °C (low) to 17.4 °C (high). Annual precipitation averages 1256.8 Millimeters. Sugar Grove is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.3 °C | 5.8 °C | 108.46 mm |
| February | -3.7 °C | 7.8 °C | 88.9 mm |
| March | -0.7 °C | 12.2 °C | 102.62 mm |
| April | 3.8 °C | 17.6 °C | 109.73 mm |
| May | 8.6 °C | 22 °C | 133.6 mm |
| June | 13 °C | 25.7 °C | 122.68 mm |
| July | 16 °C | 27.4 °C | 119.38 mm |
| August | 15.2 °C | 27 °C | 112.78 mm |
| September | 11.7 °C | 24.1 °C | 91.19 mm |
| October | 5.2 °C | 18.7 °C | 81.53 mm |
| November | -1.1 °C | 13 °C | 82.3 mm |
| December | -3.7 °C | 7.9 °C | 103.63 mm |
| Annual | 4.9 °C | 17.4 °C | 1256.8 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |