East Berwick, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 5.1 °C (low) to 16.9 °C (high). Annual precipitation averages 1104.7 Millimeters. East Berwick 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 | -6.6 °C | 2.7 °C | 71.63 mm |
| February | -5.8 °C | 4.3 °C | 56.64 mm |
| March | -1.8 °C | 9.2 °C | 74.42 mm |
| April | 3.8 °C | 17.1 °C | 96.77 mm |
| May | 9.3 °C | 23.1 °C | 97.03 mm |
| June | 14.6 °C | 27.4 °C | 120.14 mm |
| July | 16.9 °C | 30 °C | 117.86 mm |
| August | 16.1 °C | 28.9 °C | 105.92 mm |
| September | 12.1 °C | 25.1 °C | 122.94 mm |
| October | 5.7 °C | 18.3 °C | 92.46 mm |
| November | 0.6 °C | 11.2 °C | 72.64 mm |
| December | -3.4 °C | 5.3 °C | 76.2 mm |
| Annual | 5.1 °C | 16.9 °C | 1104.65 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 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |