| 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 |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| 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: | 56d - Michigan Lake Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49128 - Three Oaks, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 19 | 28 | 38 | 48 | 58 | 62 | 61 | 53 | 42 | 33 | 22 | 40 |
| Avg Max Temp (°F) | 31 | 36 | 47 | 59 | 71 | 80 | 83 | 82 | 75 | 63 | 48 | 36 | 59 |
| Avg Precip (In.) | 2.23 | 1.82 | 2.78 | 3.57 | 3.62 | 4.13 | 3.65 | 3.84 | 3.88 | 3.19 | 3.52 | 2.95 | 39.18 |