Markleysburg, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.6 °C (low) to 15.3 °C (high). Annual precipitation averages 1287.3 Millimeters. Markleysburg 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 | -7.6 °C | 1.9 °C | 103.12 mm |
| February | -6.6 °C | 3.9 °C | 92.96 mm |
| March | -2.9 °C | 8.7 °C | 108.97 mm |
| April | 2.6 °C | 15.9 °C | 110.24 mm |
| May | 8 °C | 20.9 °C | 128.02 mm |
| June | 12.7 °C | 24.9 °C | 130.56 mm |
| July | 14.8 °C | 26.9 °C | 125.22 mm |
| August | 14.1 °C | 26.2 °C | 108.2 mm |
| September | 10.1 °C | 22.9 °C | 100.58 mm |
| October | 4.2 °C | 16.7 °C | 88.9 mm |
| November | -1.1 °C | 9.9 °C | 87.12 mm |
| December | -4.8 °C | 4.3 °C | 103.38 mm |
| Annual | 3.6 °C | 15.3 °C | 1287.27 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |