Friendsville, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.5 °F (low) to 55.6 °F (high). Annual precipitation averages 46.3 Inches. Friendsville is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.5 °F | 30.3 °F | 3.19 in. |
| February | 15.2 °F | 32.8 °F | 2.52 in. |
| March | 22.5 °F | 41.0 °F | 3.28 in. |
| April | 34.1 °F | 54.7 °F | 3.98 in. |
| May | 44.5 °F | 66.4 °F | 4.0 in. |
| June | 53.9 °F | 74.6 °F | 4.71 in. |
| July | 58.2 °F | 78.8 °F | 4.49 in. |
| August | 56.5 °F | 77.9 °F | 4.57 in. |
| September | 49.0 °F | 71.0 °F | 4.32 in. |
| October | 38.8 °F | 58.3 °F | 4.41 in. |
| November | 29.6 °F | 45.8 °F | 3.4 in. |
| December | 21.3 °F | 35.4 °F | 3.39 in. |
| Annual | 36.5 °F | 55.6 °F | 46.26 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |