| 2023 Hardiness Zone: | Zone 3b: -35°F to -30°F | |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F | |
| 1990 Hardiness Zone: | Zone 3a: -40F to -35F | |
| Average First Frost Date: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | May 21 - May 31 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 50q - Itasca and St. Louis Moraines | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 56570 - Osage, MN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -6 | 1 | 15 | 29 | 42 | 51 | 56 | 54 | 45 | 33 | 18 | 1 | 28 |
| Avg Max Temp (°F) | 17 | 25 | 37 | 54 | 69 | 77 | 81 | 79 | 69 | 55 | 35 | 21 | 52 |
| Avg Precip (In.) | .73 | .54 | 1.23 | 1.75 | 2.82 | 4.23 | 4.04 | 3.69 | 2.81 | 2.49 | 1.21 | .63 | 26.18 |