Halfway House, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.2 °C (low) to 17 °C (high). Annual precipitation averages 1234.5 Millimeters. Halfway House is located in USDA Plant Hardiness Zone 7a. 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 | -5.6 °C | 3.7 °C | 86.87 mm |
| February | -5 °C | 5.1 °C | 71.12 mm |
| March | -0.9 °C | 9.9 °C | 100.84 mm |
| April | 4.9 °C | 16.7 °C | 96.52 mm |
| May | 10.4 °C | 22.1 °C | 101.35 mm |
| June | 15.5 °C | 27 °C | 112.78 mm |
| July | 18.3 °C | 29.6 °C | 121.41 mm |
| August | 17.4 °C | 28.6 °C | 113.03 mm |
| September | 13.3 °C | 24.9 °C | 133.86 mm |
| October | 6.9 °C | 18.2 °C | 109.47 mm |
| November | 1.6 °C | 12.1 °C | 82.55 mm |
| December | -2.4 °C | 6.4 °C | 104.65 mm |
| Annual | 6.2 °C | 17 °C | 1234.45 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |