Rochester, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.6 °C (low) to 13.9 °C (high). Annual precipitation averages 877.1 Millimeters. 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 | -7.6 °C | 0.4 °C | 61.47 mm |
| February | -7.3 °C | 1.2 °C | 48.77 mm |
| March | -3.4 °C | 5.7 °C | 62.48 mm |
| April | 2.4 °C | 12.5 °C | 74.42 mm |
| May | 8.5 °C | 19.2 °C | 72.39 mm |
| June | 14 °C | 24.4 °C | 85.6 mm |
| July | 16.9 °C | 26.7 °C | 87.88 mm |
| August | 16.2 °C | 26.1 °C | 81.28 mm |
| September | 12.4 °C | 22.4 °C | 81.53 mm |
| October | 6.4 °C | 15.8 °C | 86.36 mm |
| November | 0.9 °C | 9.3 °C | 67.82 mm |
| December | -3.9 °C | 3.3 °C | 67.06 mm |
| Annual | 4.6 °C | 13.9 °C | 877.06 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |