Rochester, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.5 °F (low) to 54.4 °F (high). Annual precipitation averages 34.6 Inches. Rochester is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.6 °F | 23.2 °F | 0.96 in. |
| February | 10.2 °F | 27.8 °F | 1.01 in. |
| March | 22.6 °F | 40.2 °F | 1.89 in. |
| April | 34.7 °F | 55.1 °F | 3.36 in. |
| May | 46.7 °F | 67.6 °F | 4.55 in. |
| June | 57.2 °F | 77.4 °F | 5.47 in. |
| July | 61.0 °F | 81.1 °F | 4.05 in. |
| August | 58.6 °F | 78.7 °F | 4.4 in. |
| September | 50.5 °F | 71.9 °F | 3.71 in. |
| October | 38.0 °F | 58.4 °F | 2.4 in. |
| November | 25.9 °F | 42.3 °F | 1.62 in. |
| December | 14.0 °F | 29.0 °F | 1.22 in. |
| Annual | 35.5 °F | 54.4 °F | 34.64 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |