| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 52c - Rochester/Paleozoic Plateau Upland |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 55904 - Rochester, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 3 | 10 | 22 | 34 | 46 | 56 | 60 | 58 | 49 | 37 | 24 | 10 | 34 |
| Avg Max Temp (°F) | 21 | 28 | 40 | 56 | 69 | 78 | 82 | 79 | 71 | 58 | 40 | 26 | 54 |
| Avg Precip (In.) | 1 | .76 | 1.88 | 3.09 | 3.59 | 4.11 | 4.7 | 4.41 | 3.29 | 2.3 | 2.08 | 1.04 | 32.24 |