Bronson, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.1 °C (low) to 14.4 °C (high). Annual precipitation averages 990.1 Millimeters. Bronson 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 | -8.6 °C | -0.6 °C | 63.75 mm |
| February | -7.9 °C | 1.1 °C | 53.59 mm |
| March | -3.3 °C | 7.1 °C | 60.71 mm |
| April | 2.8 °C | 14.3 °C | 89.66 mm |
| May | 9.4 °C | 20.7 °C | 107.7 mm |
| June | 14.8 °C | 25.8 °C | 104.39 mm |
| July | 16.3 °C | 27.7 °C | 98.81 mm |
| August | 15.2 °C | 26.6 °C | 106.17 mm |
| September | 11.1 °C | 23.4 °C | 84.84 mm |
| October | 4.9 °C | 16.2 °C | 87.63 mm |
| November | -0.4 °C | 8.6 °C | 73.41 mm |
| December | -5.2 °C | 2.1 °C | 59.44 mm |
| Annual | 4.1 °C | 14.4 °C | 990.1 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |