| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°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 49453 - Saugatuck, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 19 | 27 | 36 | 46 | 56 | 61 | 60 | 52 | 42 | 33 | 23 | 39 |
| Avg Max Temp (°F) | 31 | 34 | 44 | 55 | 67 | 76 | 80 | 79 | 72 | 61 | 48 | 36 | 57 |
| Avg Precip (In.) | 2.27 | 1.47 | 2.2 | 3.17 | 3.35 | 3.53 | 3.41 | 3.68 | 4.01 | 2.9 | 3.28 | 2.81 | 36.09 |