Washingtonville, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40.6 °F (low) to 61.2 °F (high). Annual precipitation averages 44.4 Inches. Washingtonville 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.5 °F | 35.7 °F | 3.27 in. |
| February | 20.6 °F | 38.7 °F | 2.47 in. |
| March | 28.0 °F | 48.1 °F | 3.51 in. |
| April | 38.0 °F | 61.4 °F | 3.92 in. |
| May | 48.5 °F | 71.9 °F | 3.9 in. |
| June | 57.8 °F | 80.1 °F | 4.14 in. |
| July | 62.0 °F | 84.6 °F | 4.33 in. |
| August | 60.4 °F | 82.7 °F | 3.96 in. |
| September | 53.0 °F | 76.0 °F | 4.37 in. |
| October | 41.8 °F | 63.5 °F | 3.9 in. |
| November | 32.3 °F | 51.4 °F | 3.17 in. |
| December | 25.1 °F | 40.4 °F | 3.43 in. |
| Annual | 40.6 °F | 61.2 °F | 44.37 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 | Dfb - Humid Continental Mild Summer, Wet All Year |