| 2023 Hardiness Zone: | Zone 3b: -35°F to -30°F | |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 3a: -40°F to -35°F | |
| 1990 Hardiness Zone: | Zone 2b: -45F to -40F | |
| Average First Frost Date: | Sep.11 - Sep. 20 | |
| Average Last Frost Date: | May 21 - May 31 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 50r - Chippewa Plains | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 56630 - Blackduck, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -8 | 0 | 13 | 28 | 41 | 51 | 56 | 53 | 43 | 32 | 17 | 0 | 27 |
| Avg Max Temp (°F) | 15 | 23 | 35 | 52 | 66 | 74 | 78 | 76 | 65 | 53 | 33 | 19 | 49 |
| Avg Precip (In.) | .74 | .56 | 1.01 | 1.52 | 2.77 | 4.02 | 4.16 | 3.57 | 2.91 | 2.38 | 1.25 | .65 | 25.54 |