Hollidaysburg, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.5 °C (low) to 16.1 °C (high). Annual precipitation averages 1030.2 Millimeters. Hollidaysburg 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 | -6.8 °C | 2.4 °C | 69.85 mm |
| February | -6.3 °C | 4.2 °C | 59.69 mm |
| March | -2.6 °C | 8.9 °C | 82.55 mm |
| April | 3.2 °C | 16.3 °C | 86.87 mm |
| May | 8.9 °C | 21.8 °C | 102.62 mm |
| June | 13.9 °C | 26.2 °C | 97.54 mm |
| July | 16.2 °C | 28.8 °C | 90.93 mm |
| August | 15.4 °C | 27.9 °C | 92.96 mm |
| September | 11.5 °C | 23.9 °C | 102.62 mm |
| October | 5.2 °C | 17.4 °C | 87.88 mm |
| November | -0.2 °C | 10.8 °C | 77.22 mm |
| December | -4.1 °C | 4.7 °C | 79.5 mm |
| Annual | 4.5 °C | 16.1 °C | 1030.23 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |