Glasgow, West Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6.8 °C (low) to 19.2 °C (high). Annual precipitation averages 1187.7 Millimeters. Glasgow is located in USDA Plant Hardiness Zone 7a. 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 | -4.3 °C | 6.3 °C | 80.52 mm |
| February | -3.2 °C | 8.4 °C | 77.22 mm |
| March | 0.3 °C | 13.5 °C | 109.73 mm |
| April | 5.6 °C | 20.3 °C | 96.52 mm |
| May | 11.2 °C | 24.3 °C | 124.71 mm |
| June | 15.9 °C | 28.3 °C | 114.55 mm |
| July | 18.3 °C | 29.9 °C | 145.03 mm |
| August | 17.6 °C | 29.5 °C | 101.35 mm |
| September | 13.8 °C | 26.6 °C | 89.92 mm |
| October | 7.2 °C | 20.6 °C | 76.71 mm |
| November | 1.2 °C | 13.9 °C | 75.69 mm |
| December | -1.9 °C | 8.4 °C | 95.76 mm |
| Annual | 6.8 °C | 19.2 °C | 1187.71 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |