Glenfield, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.4 °F (low) to 62.2 °F (high). Annual precipitation averages 40.1 Inches. Glenfield is located in USDA Plant Hardiness Zone 7a. 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 | 22.6 °F | 37.5 °F | 3.24 in. |
| February | 23.8 °F | 39.9 °F | 2.57 in. |
| March | 30.8 °F | 49.1 °F | 3.09 in. |
| April | 40.8 °F | 62.9 °F | 3.46 in. |
| May | 51.1 °F | 72.4 °F | 3.74 in. |
| June | 60.0 °F | 81.0 °F | 4.12 in. |
| July | 64.3 °F | 84.8 °F | 4.11 in. |
| August | 63.2 °F | 83.4 °F | 3.32 in. |
| September | 56.4 °F | 76.9 °F | 3.58 in. |
| October | 45.1 °F | 64.5 °F | 2.93 in. |
| November | 35.2 °F | 52.0 °F | 2.86 in. |
| December | 27.9 °F | 41.8 °F | 3.11 in. |
| Annual | 43.4 °F | 62.2 °F | 40.13 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 |