| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| Average First Frost Date: | Sep.11 - Sep. 20 | |
| Average Last Frost Date: | Jun. 1 - Jun. 10 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 50ae - Mio Plateau | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 48625 - Harrison, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 9 | 10 | 19 | 30 | 41 | 50 | 55 | 53 | 45 | 35 | 26 | 16 | 32 |
| Avg Max Temp (°F) | 26 | 29 | 40 | 54 | 67 | 76 | 80 | 78 | 69 | 57 | 43 | 31 | 54 |
| Avg Precip (In.) | 1.86 | 1.36 | 2.1 | 2.67 | 3.05 | 2.95 | 2.67 | 3.55 | 3.51 | 2.72 | 2.4 | 2.2 | 31.03 |