Flint, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.2 °C (low) to 14 °C (high). Annual precipitation averages 845.1 Millimeters. Flint is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.3 °C | -1 °C | 56.9 mm |
| February | -9 °C | 0.6 °C | 42.93 mm |
| March | -4.6 °C | 6.2 °C | 50.8 mm |
| April | 1.6 °C | 13.4 °C | 84.58 mm |
| May | 7.9 °C | 20.2 °C | 94.49 mm |
| June | 13.3 °C | 25.5 °C | 84.07 mm |
| July | 15.5 °C | 27.7 °C | 89.41 mm |
| August | 14.7 °C | 26.6 °C | 81.28 mm |
| September | 10.4 °C | 23.1 °C | 73.41 mm |
| October | 4.5 °C | 15.7 °C | 74.42 mm |
| November | -0.8 °C | 8.3 °C | 59.94 mm |
| December | -5.5 °C | 1.8 °C | 52.83 mm |
| Annual | 3.2 °C | 14 °C | 845.06 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |