Detroit, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.7 °C (low) to 14.9 °C (high). Annual precipitation averages 928.4 Millimeters. Detroit is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.9 °C | 0.1 °C | 69.85 mm |
| February | -6.2 °C | 1.7 °C | 57.91 mm |
| March | -2.1 °C | 6.9 °C | 65.28 mm |
| April | 3.8 °C | 14.2 °C | 81.28 mm |
| May | 10 °C | 20.7 °C | 101.85 mm |
| June | 15.7 °C | 26.2 °C | 86.36 mm |
| July | 18.2 °C | 28.4 °C | 91.44 mm |
| August | 17.5 °C | 27.4 °C | 87.38 mm |
| September | 13.5 °C | 23.8 °C | 77.22 mm |
| October | 7 °C | 16.6 °C | 77.22 mm |
| November | 1.4 °C | 9.2 °C | 69.6 mm |
| December | -3.3 °C | 3.1 °C | 62.99 mm |
| Annual | 5.7 °C | 14.9 °C | 928.38 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |