| 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 6a: -10F to -5F |
| 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: | 51m - Manistee-Leelanau Shore |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49675 - Onekama, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 17 | 24 | 34 | 44 | 52 | 58 | 58 | 51 | 41 | 32 | 22 | 37 |
| Avg Max Temp (°F) | 29 | 32 | 41 | 54 | 67 | 76 | 80 | 78 | 70 | 59 | 45 | 34 | 56 |
| Avg Precip (In.) | 2.3 | 1.58 | 2.15 | 2.69 | 2.67 | 3.23 | 2.99 | 3.78 | 3.74 | 3.31 | 2.96 | 2.41 | 33.81 |