| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | Jun. 1 - Jun. 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 50ac - Onaway Moraines |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49765 - Onaway, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 10 | 18 | 30 | 41 | 50 | 55 | 54 | 47 | 38 | 29 | 18 | 33 |
| Avg Max Temp (°F) | 27 | 31 | 40 | 54 | 68 | 77 | 81 | 79 | 70 | 59 | 44 | 32 | 55 |
| Avg Precip (In.) | 1.9 | 1.32 | 2.1 | 2.43 | 2.75 | 2.71 | 3.09 | 3.46 | 3.44 | 2.74 | 2.38 | 2.05 | 30.36 |