| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| 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: | 57e - Saginaw Lake Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 48734 - Frankenmuth, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 16 | 25 | 35 | 46 | 55 | 60 | 58 | 50 | 40 | 31 | 21 | 38 |
| Avg Max Temp (°F) | 29 | 32 | 43 | 57 | 70 | 79 | 83 | 81 | 73 | 61 | 46 | 34 | 57 |
| Avg Precip (In.) | 1.66 | 1.34 | 2.24 | 2.83 | 2.85 | 3.24 | 2.68 | 3.34 | 3.9 | 2.58 | 2.65 | 2.01 | 31.34 |