Hunterstown, 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 17.4 °C (high). Annual precipitation averages 1144.3 Millimeters. Hunterstown is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.4 °C | 3.9 °C | 83.31 mm |
| February | -4.7 °C | 5.7 °C | 68.07 mm |
| March | -0.7 °C | 10.4 °C | 98.55 mm |
| April | 5 °C | 17.4 °C | 92.2 mm |
| May | 10.5 °C | 22.7 °C | 105.92 mm |
| June | 15.6 °C | 27.4 °C | 102.62 mm |
| July | 18.1 °C | 30.1 °C | 101.35 mm |
| August | 17.1 °C | 28.9 °C | 96.52 mm |
| September | 13.1 °C | 25.2 °C | 124.97 mm |
| October | 6.7 °C | 18.6 °C | 99.82 mm |
| November | 1.3 °C | 12.3 °C | 81.28 mm |
| December | -2.8 °C | 6.3 °C | 89.66 mm |
| Annual | 6.2 °C | 17.4 °C | 1144.27 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |