| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 57a - Maumee Lake Plains |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 48050 - New Haven, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 18 | 26 | 36 | 47 | 57 | 62 | 60 | 53 | 42 | 33 | 23 | 39 |
| Avg Max Temp (°F) | 31 | 33 | 43 | 56 | 68 | 78 | 82 | 80 | 73 | 60 | 47 | 35 | 57 |
| Avg Precip (In.) | 1.9 | 1.67 | 2.38 | 3.05 | 2.85 | 3.14 | 3.27 | 3.12 | 3.31 | 2.3 | 2.69 | 2.4 | 32.09 |