Pontiac, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.1 °F (low) to 57.4 °F (high). Annual precipitation averages 33.5 Inches. Pontiac is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.0 °F | 30.4 °F | 2.27 in. |
| February | 16.9 °F | 33.4 °F | 1.91 in. |
| March | 25.1 °F | 43.4 °F | 2.24 in. |
| April | 36.1 °F | 56.5 °F | 2.97 in. |
| May | 47.5 °F | 68.5 °F | 3.85 in. |
| June | 57.3 °F | 78.0 °F | 3.26 in. |
| July | 61.3 °F | 82.0 °F | 3.19 in. |
| August | 60.3 °F | 80.2 °F | 3.25 in. |
| September | 53.1 °F | 73.8 °F | 2.99 in. |
| October | 41.7 °F | 60.2 °F | 2.89 in. |
| November | 31.7 °F | 47.2 °F | 2.44 in. |
| December | 22.7 °F | 35.3 °F | 2.27 in. |
| Annual | 39.1 °F | 57.4 °F | 33.53 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |