| 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 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 56g - Lansing Loamy Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 48858 - Mount Pleasant, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 14 | 22 | 34 | 45 | 54 | 59 | 57 | 49 | 38 | 29 | 20 | 36 |
| Avg Max Temp (°F) | 28 | 31 | 42 | 55 | 69 | 78 | 82 | 80 | 71 | 59 | 45 | 33 | 56 |
| Avg Precip (In.) | 1.68 | 1.27 | 2.15 | 3.07 | 2.81 | 3.41 | 2.71 | 3.7 | 3.61 | 2.78 | 2.57 | 1.94 | 31.71 |