West Newton, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.7 °C (low) to 17.2 °C (high). Annual precipitation averages 1025.9 Millimeters. West Newton is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.6 °C | 3.7 °C | 76.71 mm |
| February | -5.1 °C | 5.1 °C | 62.48 mm |
| March | -1.2 °C | 10.3 °C | 78.23 mm |
| April | 4.2 °C | 17.7 °C | 82.55 mm |
| May | 9.9 °C | 22.8 °C | 100.33 mm |
| June | 14.9 °C | 27.1 °C | 111.25 mm |
| July | 17.3 °C | 29.2 °C | 108.71 mm |
| August | 16.7 °C | 28.7 °C | 88.9 mm |
| September | 12.6 °C | 25.2 °C | 91.44 mm |
| October | 6.3 °C | 18.6 °C | 76.71 mm |
| November | 1 °C | 11.7 °C | 72.9 mm |
| December | -2.7 °C | 6 °C | 75.69 mm |
| Annual | 5.7 °C | 17.2 °C | 1025.9 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |