| 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 5b: -15°F to -10°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: | 57e - Saginaw Lake Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 48441 - Harbor Beach, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 15 | 24 | 34 | 44 | 53 | 59 | 58 | 51 | 40 | 31 | 21 | 37 |
| Avg Max Temp (°F) | 28 | 30 | 38 | 49 | 61 | 70 | 76 | 75 | 68 | 57 | 44 | 33 | 52 |
| Avg Precip (In.) | 2.61 | 1.99 | 2.41 | 2.79 | 2.98 | 2.8 | 2.9 | 3.57 | 4.02 | 2.68 | 3.02 | 2.68 | 34.45 |