Glasgow, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.2 °F (low) to 61.6 °F (high). Annual precipitation averages 40.7 Inches. 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 | 21.3 °F | 36.9 °F | 3.14 in. |
| February | 22.4 °F | 39.7 °F | 2.38 in. |
| March | 29.6 °F | 49.0 °F | 3.22 in. |
| April | 39.6 °F | 62.4 °F | 3.66 in. |
| May | 49.9 °F | 72.0 °F | 3.79 in. |
| June | 58.7 °F | 80.3 °F | 4.13 in. |
| July | 63.2 °F | 83.8 °F | 4.16 in. |
| August | 61.8 °F | 82.4 °F | 3.48 in. |
| September | 55.0 °F | 76.1 °F | 3.65 in. |
| October | 43.8 °F | 63.9 °F | 3.03 in. |
| November | 34.2 °F | 51.7 °F | 2.9 in. |
| December | 26.9 °F | 41.2 °F | 3.14 in. |
| Annual | 42.2 °F | 61.6 °F | 40.68 in. |
| 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 : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |