Hickory Hills, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.1 °C (low) to 14.3 °C (high). Annual precipitation averages 1315 Millimeters. Hickory Hills is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.9 °C | 0.5 °C | 92.96 mm |
| February | -8.2 °C | 2 °C | 72.64 mm |
| March | -4.1 °C | 6.5 °C | 96.27 mm |
| April | 1.7 °C | 14.2 °C | 108.97 mm |
| May | 7.5 °C | 20.3 °C | 108.2 mm |
| June | 12.4 °C | 24.6 °C | 134.62 mm |
| July | 14.9 °C | 26.9 °C | 123.7 mm |
| August | 13.9 °C | 25.9 °C | 121.67 mm |
| September | 10.1 °C | 22.2 °C | 133.86 mm |
| October | 4.1 °C | 15.8 °C | 123.95 mm |
| November | -1 °C | 9.1 °C | 94.23 mm |
| December | -5.4 °C | 3.1 °C | 103.89 mm |
| Annual | 3.1 °C | 14.3 °C | 1314.96 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |