Glassport, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.1 °F (low) to 62.7 °F (high). Annual precipitation averages 41.5 Inches. Glassport is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.5 °F | 38.2 °F | 3.17 in. |
| February | 23.7 °F | 40.7 °F | 2.54 in. |
| March | 30.4 °F | 49.9 °F | 3.33 in. |
| April | 40.3 °F | 63.4 °F | 3.44 in. |
| May | 50.8 °F | 73.1 °F | 3.91 in. |
| June | 59.8 °F | 80.7 °F | 4.55 in. |
| July | 64.0 °F | 85.0 °F | 4.24 in. |
| August | 62.9 °F | 83.6 °F | 3.59 in. |
| September | 55.9 °F | 77.2 °F | 3.47 in. |
| October | 44.4 °F | 65.1 °F | 3.13 in. |
| November | 34.7 °F | 52.8 °F | 2.98 in. |
| December | 27.7 °F | 42.5 °F | 3.14 in. |
| Annual | 43.1 °F | 62.7 °F | 41.49 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°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 |