Newville, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6 °C (low) to 17.2 °C (high). Annual precipitation averages 1101.9 Millimeters. Newville 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 | -5.6 °C | 3.3 °C | 80.26 mm |
| February | -4.9 °C | 5.2 °C | 63.25 mm |
| March | -0.9 °C | 10.2 °C | 92.96 mm |
| April | 4.7 °C | 17.2 °C | 93.98 mm |
| May | 10.3 °C | 22.7 °C | 106.43 mm |
| June | 15.4 °C | 27.6 °C | 103.12 mm |
| July | 17.9 °C | 30.3 °C | 100.84 mm |
| August | 17 °C | 29.1 °C | 92.46 mm |
| September | 12.9 °C | 25.2 °C | 111.51 mm |
| October | 6.5 °C | 18.5 °C | 95 mm |
| November | 1.1 °C | 11.9 °C | 76.2 mm |
| December | -3 °C | 5.7 °C | 85.85 mm |
| Annual | 6 °C | 17.2 °C | 1101.86 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 |