East Lansdowne, Pennsylvania has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.3 °C (low) to 18.1 °C (high). Annual precipitation averages 1186.4 Millimeters. East Lansdowne 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 | -2.4 °C | 5.1 °C | 88.14 mm |
| February | -1.7 °C | 6.6 °C | 71.37 mm |
| March | 1.9 °C | 10.9 °C | 108.97 mm |
| April | 7.7 °C | 17.8 °C | 90.93 mm |
| May | 13.1 °C | 22.8 °C | 96.52 mm |
| June | 18.3 °C | 28.2 °C | 107.95 mm |
| July | 21.4 °C | 30.5 °C | 114.55 mm |
| August | 20.6 °C | 29.5 °C | 119.89 mm |
| September | 16.9 °C | 26.1 °C | 106.68 mm |
| October | 10.4 °C | 19.2 °C | 96.77 mm |
| November | 4.7 °C | 13.2 °C | 77.47 mm |
| December | 0.6 °C | 7.7 °C | 107.19 mm |
| Annual | 9.3 °C | 18.1 °C | 1186.43 mm |
| 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 : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |