Mountainhome, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.2 °C (low) to 14.5 °C (high). Annual precipitation averages 1335.3 Millimeters. Mountainhome 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.9 °C | 0.7 °C | 99.31 mm |
| February | -8.2 °C | 2.2 °C | 75.95 mm |
| March | -4.1 °C | 6.8 °C | 98.81 mm |
| April | 1.7 °C | 14.4 °C | 110.24 mm |
| May | 7.6 °C | 20.3 °C | 108.46 mm |
| June | 12.6 °C | 24.8 °C | 135.13 mm |
| July | 15.2 °C | 27.3 °C | 116.08 mm |
| August | 14.3 °C | 26.3 °C | 120.4 mm |
| September | 10.4 °C | 22.6 °C | 131.57 mm |
| October | 4.1 °C | 15.8 °C | 133.1 mm |
| November | -1 °C | 9.4 °C | 93.73 mm |
| December | -5.3 °C | 3.5 °C | 112.52 mm |
| Annual | 3.2 °C | 14.5 °C | 1335.3 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |