| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| 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: | 56f - Lake Michigan Moraines |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49098 - Watervliet, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 19 | 27 | 37 | 47 | 57 | 61 | 60 | 52 | 42 | 33 | 23 | 40 |
| Avg Max Temp (°F) | 31 | 35 | 46 | 57 | 69 | 78 | 82 | 80 | 73 | 62 | 48 | 36 | 58 |
| Avg Precip (In.) | 2.29 | 1.73 | 2.52 | 3.52 | 3.45 | 3.57 | 3.41 | 3.68 | 4.06 | 3.13 | 3.36 | 2.88 | 37.59 |