| 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: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | May 11 - May 20 |
| 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 55992 - Zumbrota, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 3 | 9 | 22 | 34 | 46 | 55 | 60 | 57 | 48 | 37 | 24 | 10 | 34 |
| Avg Max Temp (°F) | 22 | 30 | 42 | 58 | 71 | 79 | 83 | 81 | 73 | 61 | 41 | 27 | 56 |
| Avg Precip (In.) | 1.07 | .72 | 1.84 | 3.16 | 3.7 | 4.23 | 4.49 | 4.22 | 3.4 | 2.46 | 2.08 | 1.05 | 32.41 |