| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F | |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F | |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 51i - Big Woods | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 55382 - South Haven, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 0 | 7 | 20 | 33 | 46 | 55 | 60 | 58 | 48 | 36 | 22 | 7 | 33 |
| Avg Max Temp (°F) | 20 | 27 | 39 | 56 | 70 | 78 | 83 | 80 | 71 | 58 | 39 | 25 | 54 |
| Avg Precip (In.) | .87 | .67 | 1.64 | 2.28 | 3.32 | 4.55 | 3.91 | 4.03 | 2.92 | 2.24 | 1.7 | .73 | 28.85 |