| 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 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 21 - May 31 |
| 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 49670 - Northport, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 13 | 21 | 32 | 42 | 51 | 57 | 57 | 49 | 40 | 31 | 21 | 36 |
| Avg Max Temp (°F) | 28 | 30 | 39 | 52 | 65 | 74 | 79 | 77 | 69 | 58 | 44 | 33 | 54 |
| Avg Precip (In.) | 2.42 | 1.53 | 2.06 | 2.47 | 2.65 | 2.84 | 2.99 | 3.47 | 3.73 | 3.2 | 2.82 | 2.47 | 32.66 |