| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| 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: | 56d - Michigan Lake Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49452 - Rothbury, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 17 | 24 | 33 | 43 | 53 | 58 | 57 | 50 | 40 | 31 | 22 | 37 |
| Avg Max Temp (°F) | 29 | 32 | 42 | 54 | 67 | 75 | 80 | 78 | 70 | 59 | 45 | 34 | 55 |
| Avg Precip (In.) | 2.01 | 1.24 | 2.33 | 3.09 | 2.79 | 2.96 | 2.7 | 4.07 | 3.56 | 3.33 | 3.19 | 1.95 | 33.22 |