| 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. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 56h - Interlobate Dead Ice Moraines |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49230 - Brooklyn, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 16 | 25 | 36 | 46 | 56 | 60 | 58 | 51 | 40 | 31 | 20 | 38 |
| Avg Max Temp (°F) | 30 | 34 | 45 | 57 | 70 | 79 | 83 | 81 | 73 | 61 | 47 | 35 | 58 |
| Avg Precip (In.) | 1.75 | 1.6 | 2.44 | 3.15 | 3.28 | 3.51 | 3.26 | 3.54 | 3.42 | 2.48 | 2.76 | 2.39 | 33.58 |