| 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 4a: -30F to -25F |
| 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: | 50ae - Mio Plateau |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 48653 - Roscommon, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 8 | 8 | 17 | 29 | 40 | 49 | 53 | 52 | 45 | 35 | 26 | 15 | 31 |
| Avg Max Temp (°F) | 26 | 29 | 39 | 53 | 68 | 76 | 80 | 78 | 69 | 57 | 42 | 30 | 54 |
| Avg Precip (In.) | 1.73 | 1.27 | 1.96 | 2.42 | 2.77 | 3.12 | 3.16 | 3.74 | 3.51 | 2.73 | 2.33 | 1.83 | 30.57 |