| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 55a - Clayey High Lime Till Plains |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 48189 - Whitmore Lake, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 18 | 26 | 36 | 47 | 57 | 61 | 60 | 52 | 41 | 32 | 21 | 39 |
| Avg Max Temp (°F) | 30 | 34 | 45 | 57 | 70 | 79 | 83 | 80 | 73 | 61 | 47 | 35 | 58 |
| Avg Precip (In.) | 1.86 | 1.75 | 2.43 | 3.12 | 2.93 | 3.35 | 2.93 | 3.42 | 3.32 | 2.38 | 2.76 | 2.47 | 32.73 |