| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 6a: -10°F to -5°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 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 50aa - Menominee-Drummond Lakeshore |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49781 - Saint Ignace, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 11 | 20 | 31 | 43 | 52 | 59 | 59 | 50 | 40 | 31 | 20 | 36 |
| Avg Max Temp (°F) | 25 | 26 | 34 | 46 | 59 | 68 | 75 | 74 | 65 | 53 | 41 | 30 | 50 |
| Avg Precip (In.) | 1.82 | 1.25 | 1.93 | 2.32 | 2.51 | 2.55 | 2.78 | 3.23 | 3.55 | 2.88 | 2.45 | 2.07 | 29.32 |