Rochester, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.7 °C (low) to 20.1 °C (high). Annual precipitation averages 1297.7 Millimeters. Rochester is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.9 °C | 6.5 °C | 93.22 mm |
| February | -2.4 °C | 9.2 °C | 104.9 mm |
| March | 1.7 °C | 14.2 °C | 117.6 mm |
| April | 7.1 °C | 20.8 °C | 123.7 mm |
| May | 12.8 °C | 25.5 °C | 131.32 mm |
| June | 17.8 °C | 29.7 °C | 118.36 mm |
| July | 19.4 °C | 31.4 °C | 109.73 mm |
| August | 18.3 °C | 31.1 °C | 91.44 mm |
| September | 14.2 °C | 27.7 °C | 94.49 mm |
| October | 7.8 °C | 22.3 °C | 101.09 mm |
| November | 1.6 °C | 14.5 °C | 96.52 mm |
| December | -1.6 °C | 8.7 °C | 115.32 mm |
| Annual | 7.7 °C | 20.1 °C | 1297.69 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |