Bronson, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.4 °F (low) to 57.9 °F (high). Annual precipitation averages 39 Inches. 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 | 16.5 °F | 30.9 °F | 2.51 in. |
| February | 17.8 °F | 33.9 °F | 2.11 in. |
| March | 26.1 °F | 44.7 °F | 2.39 in. |
| April | 37.1 °F | 57.7 °F | 3.53 in. |
| May | 49.0 °F | 69.2 °F | 4.24 in. |
| June | 58.6 °F | 78.4 °F | 4.11 in. |
| July | 61.4 °F | 81.9 °F | 3.89 in. |
| August | 59.4 °F | 79.8 °F | 4.18 in. |
| September | 52.0 °F | 74.2 °F | 3.34 in. |
| October | 40.9 °F | 61.2 °F | 3.45 in. |
| November | 31.3 °F | 47.5 °F | 2.89 in. |
| December | 22.6 °F | 35.8 °F | 2.34 in. |
| Annual | 39.4 °F | 57.9 °F | 38.98 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 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |