| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°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: | 56h - Interlobate Dead Ice Moraines |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 48340 - Pontiac, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 18 | 26 | 36 | 47 | 57 | 61 | 60 | 52 | 42 | 32 | 22 | 39 |
| Avg Max Temp (°F) | 30 | 34 | 45 | 58 | 70 | 79 | 82 | 80 | 73 | 60 | 47 | 34 | 58 |
| Avg Precip (In.) | 1.59 | 1.52 | 2.3 | 2.81 | 2.73 | 3.22 | 2.82 | 3.16 | 3.01 | 2.55 | 2.62 | 2.25 | 30.56 |