| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 56d - Michigan Lake Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49461 - Whitehall, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 18 | 25 | 34 | 43 | 52 | 58 | 57 | 50 | 40 | 32 | 22 | 37 |
| Avg Max Temp (°F) | 30 | 32 | 42 | 55 | 67 | 75 | 80 | 78 | 70 | 59 | 45 | 34 | 56 |
| Avg Precip (In.) | 1.98 | 1.25 | 2.33 | 3.1 | 2.79 | 2.91 | 2.69 | 4.06 | 3.53 | 3.26 | 3.17 | 1.99 | 33.07 |