| 2023 Hardiness Zone: | Zone 4a: -30°F to -25°F | |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 4a: -30°F to -25°F | |
| 1990 Hardiness Zone: | Zone 3b: -35F to -30F | |
| 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: | 50b - Minnesota/Wisconsin Upland Till Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 56338 - Hillman, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -3 | 4 | 17 | 31 | 42 | 52 | 57 | 55 | 45 | 34 | 20 | 4 | 30 |
| Avg Max Temp (°F) | 18 | 26 | 38 | 54 | 68 | 76 | 80 | 78 | 68 | 56 | 37 | 22 | 52 |
| Avg Precip (In.) | .83 | .63 | 1.48 | 2.01 | 3.19 | 4.32 | 4.11 | 3.86 | 2.93 | 2.39 | 1.61 | .74 | 28.1 |