Houtzdale, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.9 °C (low) to 14.6 °C (high). Annual precipitation averages 1073.4 Millimeters. Houtzdale is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.6 °C | 0.6 °C | 70.36 mm |
| February | -8 °C | 2.3 °C | 56.13 mm |
| March | -4.2 °C | 7.2 °C | 78.23 mm |
| April | 1.7 °C | 14.8 °C | 94.74 mm |
| May | 7.3 °C | 20.8 °C | 103.89 mm |
| June | 12.1 °C | 24.9 °C | 113.28 mm |
| July | 14.4 °C | 27.2 °C | 109.22 mm |
| August | 13.6 °C | 26.4 °C | 108.71 mm |
| September | 9.6 °C | 22.6 °C | 99.82 mm |
| October | 3.6 °C | 15.8 °C | 88.65 mm |
| November | -1.3 °C | 9.1 °C | 74.68 mm |
| December | -5.2 °C | 2.9 °C | 75.69 mm |
| Annual | 2.9 °C | 14.6 °C | 1073.4 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| 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 |