| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| 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: | 50af - Cadillac Hummocky Moraines | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49639 - Hersey, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 11 | 20 | 31 | 42 | 51 | 56 | 54 | 46 | 35 | 27 | 17 | 33 |
| Avg Max Temp (°F) | 28 | 32 | 41 | 55 | 68 | 77 | 81 | 79 | 70 | 58 | 44 | 32 | 55 |
| Avg Precip (In.) | 2.05 | 1.5 | 2.23 | 2.89 | 3.04 | 3.26 | 2.72 | 4.01 | 3.97 | 2.92 | 2.73 | 2.19 | 33.52 |