Pine Grove Mills, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.9 °F (low) to 58.6 °F (high). Annual precipitation averages 43.2 Inches. 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 | 18.1 °F | 33.8 °F | 2.99 in. |
| February | 18.9 °F | 36.7 °F | 2.56 in. |
| March | 25.9 °F | 45.4 °F | 3.45 in. |
| April | 36.7 °F | 58.9 °F | 3.64 in. |
| May | 47.3 °F | 69.4 °F | 3.97 in. |
| June | 55.9 °F | 77.1 °F | 4.16 in. |
| July | 59.9 °F | 81.2 °F | 3.91 in. |
| August | 58.4 °F | 79.6 °F | 4.12 in. |
| September | 51.0 °F | 72.7 °F | 4.27 in. |
| October | 40.4 °F | 60.8 °F | 3.79 in. |
| November | 31.0 °F | 49.1 °F | 3.1 in. |
| December | 23.6 °F | 38.1 °F | 3.28 in. |
| Annual | 38.9 °F | 58.6 °F | 43.24 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |