Hemlock Farms, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.8 °C (low) to 14 °C (high). Annual precipitation averages 1221.5 Millimeters. Hemlock Farms is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.2 °C | 0.4 °C | 84.84 mm |
| February | -8.8 °C | 1.8 °C | 66.8 mm |
| March | -4.6 °C | 6.3 °C | 93.98 mm |
| April | 1.3 °C | 13.7 °C | 100.08 mm |
| May | 7.1 °C | 19.7 °C | 98.81 mm |
| June | 12.2 °C | 24.2 °C | 127.51 mm |
| July | 14.7 °C | 26.5 °C | 111.51 mm |
| August | 13.9 °C | 25.6 °C | 114.55 mm |
| September | 9.8 °C | 21.9 °C | 120.14 mm |
| October | 3.7 °C | 15.1 °C | 118.11 mm |
| November | -0.8 °C | 9.3 °C | 84.33 mm |
| December | -5.7 °C | 2.9 °C | 100.84 mm |
| Annual | 2.8 °C | 14 °C | 1221.5 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |