| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F | |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 52c - Rochester/Paleozoic Plateau Upland | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 55921 - Caledonia, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 4 | 10 | 22 | 34 | 46 | 56 | 60 | 58 | 48 | 37 | 24 | 10 | 34 |
| Avg Max Temp (°F) | 23 | 29 | 41 | 56 | 68 | 78 | 82 | 79 | 71 | 59 | 41 | 27 | 55 |
| Avg Precip (In.) | .98 | .83 | 1.93 | 3.64 | 3.8 | 4.55 | 4.59 | 4.76 | 3.5 | 2.39 | 2.35 | 1.25 | 34.57 |