Glasgow, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.7 °C (low) to 16.4 °C (high). Annual precipitation averages 1033.3 Millimeters. Glasgow is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.9 °C | 2.7 °C | 79.76 mm |
| February | -5.3 °C | 4.3 °C | 60.45 mm |
| March | -1.3 °C | 9.4 °C | 81.79 mm |
| April | 4.2 °C | 16.9 °C | 92.96 mm |
| May | 9.9 °C | 22.2 °C | 96.27 mm |
| June | 14.8 °C | 26.8 °C | 104.9 mm |
| July | 17.3 °C | 28.8 °C | 105.66 mm |
| August | 16.6 °C | 28 °C | 88.39 mm |
| September | 12.8 °C | 24.5 °C | 92.71 mm |
| October | 6.6 °C | 17.7 °C | 76.96 mm |
| November | 1.2 °C | 10.9 °C | 73.66 mm |
| December | -2.8 °C | 5.1 °C | 79.76 mm |
| Annual | 5.7 °C | 16.4 °C | 1033.27 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |