Wilmerding, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.6 °F (low) to 62.6 °F (high). Annual precipitation averages 41.6 Inches. Wilmerding is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.0 °F | 38.1 °F | 3.19 in. |
| February | 23.1 °F | 40.6 °F | 2.45 in. |
| March | 29.9 °F | 49.8 °F | 3.36 in. |
| April | 39.8 °F | 63.4 °F | 3.4 in. |
| May | 50.5 °F | 73.2 °F | 3.84 in. |
| June | 59.3 °F | 81.0 °F | 4.44 in. |
| July | 63.5 °F | 85.1 °F | 4.36 in. |
| August | 62.2 °F | 83.6 °F | 3.79 in. |
| September | 55.2 °F | 77.1 °F | 3.53 in. |
| October | 43.8 °F | 64.9 °F | 3.13 in. |
| November | 34.1 °F | 52.6 °F | 2.97 in. |
| December | 27.2 °F | 42.3 °F | 3.12 in. |
| Annual | 42.6 °F | 62.6 °F | 41.58 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |