Rochester, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3 °C (low) to 13.9 °C (high). Annual precipitation averages 920.5 Millimeters. Rochester is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.8 °C | -1.8 °C | 45.97 mm |
| February | -9.2 °C | 0.3 °C | 44.2 mm |
| March | -4.1 °C | 6.3 °C | 53.59 mm |
| April | 1.7 °C | 13.5 °C | 95 mm |
| May | 7.7 °C | 19.9 °C | 105.16 mm |
| June | 13.4 °C | 25.4 °C | 118.36 mm |
| July | 15.9 °C | 27.8 °C | 93.22 mm |
| August | 14.9 °C | 26.9 °C | 93.73 mm |
| September | 10.5 °C | 23.3 °C | 85.34 mm |
| October | 4.2 °C | 15.8 °C | 74.93 mm |
| November | -1.6 °C | 8 °C | 59.94 mm |
| December | -7.2 °C | 1.1 °C | 51.05 mm |
| Annual | 3 °C | 13.9 °C | 920.49 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |