| 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: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 56b - Elkhart Till Plains |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49046 - Delton, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 17 | 25 | 36 | 47 | 56 | 60 | 59 | 51 | 41 | 32 | 21 | 38 |
| Avg Max Temp (°F) | 31 | 35 | 46 | 59 | 72 | 80 | 84 | 82 | 74 | 62 | 48 | 35 | 59 |
| Avg Precip (In.) | 2.02 | 1.64 | 2.51 | 3.54 | 3.42 | 3.76 | 3.47 | 3.84 | 4.05 | 3 | 3.18 | 2.7 | 37.14 |