Rochester, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.1 °F (low) to 61.6 °F (high). Annual precipitation averages 40.1 Inches. 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 | 21.5 °F | 36.8 °F | 3.1 in. |
| February | 22.4 °F | 39.5 °F | 2.33 in. |
| March | 29.6 °F | 48.8 °F | 3.08 in. |
| April | 39.3 °F | 62.2 °F | 3.64 in. |
| May | 49.7 °F | 72.0 °F | 3.79 in. |
| June | 58.6 °F | 80.0 °F | 4.23 in. |
| July | 62.9 °F | 83.9 °F | 3.98 in. |
| August | 61.5 °F | 82.6 °F | 3.42 in. |
| September | 54.9 °F | 76.3 °F | 3.52 in. |
| October | 43.9 °F | 64.1 °F | 3.02 in. |
| November | 34.2 °F | 51.7 °F | 2.9 in. |
| December | 26.8 °F | 41.1 °F | 3.07 in. |
| Annual | 42.1 °F | 61.6 °F | 40.08 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |