Newtown Grant, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7 °C (low) to 17.4 °C (high). Annual precipitation averages 1246.9 Millimeters. Newtown Grant 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 | -4.8 °C | 4.2 °C | 90.42 mm |
| February | -4 °C | 5.7 °C | 71.63 mm |
| March | -0.1 °C | 10.2 °C | 108.97 mm |
| April | 5.6 °C | 16.9 °C | 95.25 mm |
| May | 11.2 °C | 22.3 °C | 108.2 mm |
| June | 16.3 °C | 27.3 °C | 114.81 mm |
| July | 19.2 °C | 29.9 °C | 125.22 mm |
| August | 18.3 °C | 28.9 °C | 123.95 mm |
| September | 14.3 °C | 25.4 °C | 107.7 mm |
| October | 7.7 °C | 18.7 °C | 103.12 mm |
| November | 2.2 °C | 12.6 °C | 84.84 mm |
| December | -2.1 °C | 6.9 °C | 112.78 mm |
| Annual | 7 °C | 17.4 °C | 1246.89 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 |