Glasgow, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6.8 °C (low) to 20 °C (high). Annual precipitation averages 1185.9 Millimeters. Glasgow is located in USDA Plant Hardiness Zone 7b. 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 | -3.7 °C | 8 °C | 89.41 mm |
| February | -2.9 °C | 10.2 °C | 74.42 mm |
| March | 0.7 °C | 14.8 °C | 99.57 mm |
| April | 5.9 °C | 20.7 °C | 106.43 mm |
| May | 11.3 °C | 24.6 °C | 110.49 mm |
| June | 15.9 °C | 28.8 °C | 107.44 mm |
| July | 18.2 °C | 30.9 °C | 101.09 mm |
| August | 17.5 °C | 29.8 °C | 85.6 mm |
| September | 13.6 °C | 26.2 °C | 123.19 mm |
| October | 6.8 °C | 20.7 °C | 94.74 mm |
| November | 0.9 °C | 15.2 °C | 97.79 mm |
| December | -2.4 °C | 9.8 °C | 95.76 mm |
| Annual | 6.8 °C | 20 °C | 1185.93 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 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |