Grill, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.6 °C (low) to 17.2 °C (high). Annual precipitation averages 1261.9 Millimeters. Grill 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.2 °C | 3.6 °C | 90.93 mm |
| February | -4.6 °C | 5.1 °C | 72.64 mm |
| March | -0.3 °C | 9.9 °C | 103.12 mm |
| April | 5.3 °C | 17.2 °C | 97.28 mm |
| May | 10.9 °C | 22.4 °C | 98.81 mm |
| June | 16.1 °C | 27.4 °C | 125.98 mm |
| July | 18.8 °C | 29.9 °C | 129.03 mm |
| August | 17.8 °C | 28.9 °C | 110.24 mm |
| September | 13.8 °C | 25.3 °C | 128.52 mm |
| October | 7.4 °C | 18.6 °C | 114.05 mm |
| November | 1.8 °C | 12.1 °C | 86.87 mm |
| December | -2.2 °C | 6.3 °C | 104.39 mm |
| Annual | 6.6 °C | 17.2 °C | 1261.86 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |