Lansdale, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.3 °F (low) to 63.3 °F (high). Annual precipitation averages 47.7 Inches. Lansdale 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.2 °F | 39.1 °F | 3.28 in. |
| February | 23.7 °F | 41.8 °F | 2.78 in. |
| March | 30.7 °F | 50.3 °F | 3.95 in. |
| April | 41.0 °F | 62.7 °F | 3.81 in. |
| May | 50.7 °F | 72.4 °F | 4.06 in. |
| June | 60.0 °F | 81.3 °F | 4.34 in. |
| July | 65.0 °F | 86.0 °F | 4.63 in. |
| August | 63.4 °F | 84.3 °F | 4.4 in. |
| September | 56.1 °F | 77.7 °F | 4.46 in. |
| October | 44.3 °F | 65.4 °F | 4.38 in. |
| November | 34.5 °F | 54.3 °F | 3.26 in. |
| December | 27.5 °F | 44.1 °F | 4.36 in. |
| Annual | 43.3 °F | 63.3 °F | 47.71 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |