| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| Average First Frost Date: | Sep. 21 - Sep. 30 | |
| Average Last Frost Date: | May 21 - May 31 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 50af - Cadillac Hummocky Moraines | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 48838 - Greenville, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 15 | 23 | 34 | 45 | 54 | 58 | 56 | 48 | 38 | 29 | 19 | 36 |
| Avg Max Temp (°F) | 29 | 33 | 43 | 57 | 70 | 79 | 83 | 80 | 73 | 60 | 46 | 34 | 57 |
| Avg Precip (In.) | 1.9 | 1.5 | 2.33 | 3.05 | 3.37 | 3.39 | 2.88 | 4.17 | 3.76 | 2.91 | 3.1 | 2.47 | 34.83 |