Hemlock Farms, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37 °F (low) to 57.1 °F (high). Annual precipitation averages 48.1 Inches. 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 | 15.5 °F | 32.8 °F | 3.34 in. |
| February | 16.1 °F | 35.2 °F | 2.63 in. |
| March | 23.8 °F | 43.4 °F | 3.7 in. |
| April | 34.3 °F | 56.6 °F | 3.94 in. |
| May | 44.7 °F | 67.4 °F | 3.89 in. |
| June | 53.9 °F | 75.5 °F | 5.02 in. |
| July | 58.4 °F | 79.7 °F | 4.39 in. |
| August | 57.1 °F | 78.0 °F | 4.51 in. |
| September | 49.7 °F | 71.4 °F | 4.73 in. |
| October | 38.7 °F | 59.1 °F | 4.65 in. |
| November | 30.5 °F | 48.8 °F | 3.32 in. |
| December | 21.7 °F | 37.3 °F | 3.97 in. |
| Annual | 37 °F | 57.1 °F | 48.09 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |