East Rochester, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.7 °C (low) to 14.2 °C (high). Annual precipitation averages 883.9 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.5 °C | 0.5 °C | 62.99 mm |
| February | -7.3 °C | 1.2 °C | 49.28 mm |
| March | -3.3 °C | 5.6 °C | 62.23 mm |
| April | 2.6 °C | 12.9 °C | 73.15 mm |
| May | 8.7 °C | 19.9 °C | 74.17 mm |
| June | 14.1 °C | 24.8 °C | 84.84 mm |
| July | 16.9 °C | 27.3 °C | 90.17 mm |
| August | 16.2 °C | 26.5 °C | 82.8 mm |
| September | 12.1 °C | 22.8 °C | 80.77 mm |
| October | 6.3 °C | 15.9 °C | 87.88 mm |
| November | 0.9 °C | 9.2 °C | 67.56 mm |
| December | -3.8 °C | 3.3 °C | 68.07 mm |
| Annual | 4.7 °C | 14.2 °C | 883.91 mm |
| 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 : -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 |