East Rochester, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.5 °C (low) to 16.4 °C (high). Annual precipitation averages 1022.6 Millimeters. East Rochester 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.9 °C | 2.6 °C | 79.25 mm |
| February | -5.4 °C | 4.2 °C | 59.69 mm |
| March | -1.4 °C | 9.3 °C | 78.49 mm |
| April | 4 °C | 16.8 °C | 92.71 mm |
| May | 9.8 °C | 22.2 °C | 96.52 mm |
| June | 14.7 °C | 26.7 °C | 107.7 mm |
| July | 17.1 °C | 28.8 °C | 101.6 mm |
| August | 16.3 °C | 28.1 °C | 87.12 mm |
| September | 12.6 °C | 24.6 °C | 89.92 mm |
| October | 6.5 °C | 17.8 °C | 76.96 mm |
| November | 1.1 °C | 10.9 °C | 74.17 mm |
| December | -3 °C | 5 °C | 78.49 mm |
| Annual | 5.5 °C | 16.4 °C | 1022.62 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |