| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | Jun. 1 - Jun. 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 50af - Cadillac Hummocky Moraines |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49665 - Marion, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 9 | 9 | 18 | 30 | 41 | 50 | 54 | 53 | 45 | 35 | 26 | 16 | 32 |
| Avg Max Temp (°F) | 27 | 30 | 40 | 53 | 68 | 76 | 81 | 78 | 69 | 57 | 43 | 31 | 54 |
| Avg Precip (In.) | 1.84 | 1.36 | 2.05 | 2.73 | 2.84 | 3.13 | 2.79 | 3.74 | 3.86 | 2.88 | 2.5 | 2 | 31.72 |