East Washington, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.5 °C (low) to 16.3 °C (high). Annual precipitation averages 1058.9 Millimeters. East Washington 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 | -6.8 °C | 2.7 °C | 81.53 mm |
| February | -6.1 °C | 4.3 °C | 60.71 mm |
| March | -2.1 °C | 9.5 °C | 86.11 mm |
| April | 3.4 °C | 16.7 °C | 83.31 mm |
| May | 8.9 °C | 21.9 °C | 110.24 mm |
| June | 13.8 °C | 26.1 °C | 116.33 mm |
| July | 16 °C | 28.4 °C | 105.41 mm |
| August | 15.1 °C | 27.8 °C | 88.65 mm |
| September | 11.3 °C | 24.3 °C | 90.68 mm |
| October | 4.9 °C | 17.6 °C | 80.01 mm |
| November | 0.1 °C | 11 °C | 75.95 mm |
| December | -4 °C | 5.2 °C | 80.01 mm |
| Annual | 4.5 °C | 16.3 °C | 1058.94 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |