| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°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. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 56b - Elkhart Till Plains |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49093 - Three Rivers, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 16 | 25 | 35 | 46 | 55 | 60 | 57 | 50 | 38 | 29 | 20 | 37 |
| Avg Max Temp (°F) | 30 | 34 | 46 | 58 | 70 | 80 | 83 | 81 | 74 | 62 | 47 | 35 | 58 |
| Avg Precip (In.) | 1.96 | 1.64 | 2.59 | 3.35 | 3.62 | 3.75 | 3.92 | 3.79 | 3.63 | 2.97 | 2.96 | 2.61 | 36.79 |