Pine Grove Mills, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.9 °C (low) to 14.8 °C (high). Annual precipitation averages 1098.3 Millimeters. Pine Grove Mills 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 | -7.7 °C | 1 °C | 75.95 mm |
| February | -7.3 °C | 2.6 °C | 65.02 mm |
| March | -3.4 °C | 7.4 °C | 87.63 mm |
| April | 2.6 °C | 14.9 °C | 92.46 mm |
| May | 8.5 °C | 20.8 °C | 100.84 mm |
| June | 13.3 °C | 25.1 °C | 105.66 mm |
| July | 15.5 °C | 27.3 °C | 99.31 mm |
| August | 14.7 °C | 26.4 °C | 104.65 mm |
| September | 10.6 °C | 22.6 °C | 108.46 mm |
| October | 4.7 °C | 16 °C | 96.27 mm |
| November | -0.6 °C | 9.5 °C | 78.74 mm |
| December | -4.7 °C | 3.4 °C | 83.31 mm |
| Annual | 3.9 °C | 14.8 °C | 1098.3 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 |