| 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 Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| 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 49417 - Grand Haven, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 20 | 26 | 36 | 46 | 55 | 61 | 60 | 52 | 42 | 33 | 23 | 39 |
| Avg Max Temp (°F) | 30 | 33 | 43 | 55 | 66 | 75 | 79 | 78 | 71 | 59 | 46 | 35 | 56 |
| Avg Precip (In.) | 2.19 | 1.32 | 2.32 | 2.91 | 2.97 | 3.05 | 2.55 | 3.73 | 3.44 | 2.7 | 3.14 | 2.59 | 32.93 |