Glenolden, Pennsylvania has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.6 °F (low) to 64.7 °F (high). Annual precipitation averages 46.4 Inches. Glenolden is located in USDA Plant Hardiness Zone 7b. 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 | 27.6 °F | 41.2 °F | 3.49 in. |
| February | 28.8 °F | 43.8 °F | 2.81 in. |
| March | 35.5 °F | 52.0 °F | 4.29 in. |
| April | 45.8 °F | 64.0 °F | 3.56 in. |
| May | 55.4 °F | 73.3 °F | 3.72 in. |
| June | 64.9 °F | 82.7 °F | 4.25 in. |
| July | 70.4 °F | 87.1 °F | 4.51 in. |
| August | 69.0 °F | 85.2 °F | 4.61 in. |
| September | 62.2 °F | 78.8 °F | 4.19 in. |
| October | 50.6 °F | 66.9 °F | 3.79 in. |
| November | 40.4 °F | 55.7 °F | 3.01 in. |
| December | 32.9 °F | 46.0 °F | 4.14 in. |
| Annual | 48.6 °F | 64.7 °F | 46.37 in. |
| 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 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |