Brodhead, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3 °C (low) to 14.3 °C (high). Annual precipitation averages 964.4 Millimeters. Brodhead is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.5 °C | -2.2 °C | 40.13 mm |
| February | -9.8 °C | 0.1 °C | 43.18 mm |
| March | -3.9 °C | 6.8 °C | 52.32 mm |
| April | 2.1 °C | 14.5 °C | 96.01 mm |
| May | 8.7 °C | 21 °C | 106.93 mm |
| June | 14.3 °C | 26.5 °C | 139.45 mm |
| July | 16.3 °C | 28.3 °C | 99.06 mm |
| August | 15.2 °C | 27.4 °C | 111 mm |
| September | 10.4 °C | 23.7 °C | 95.5 mm |
| October | 4.1 °C | 16.4 °C | 73.91 mm |
| November | -2 °C | 7.9 °C | 58.17 mm |
| December | -7.8 °C | 0.8 °C | 48.77 mm |
| Annual | 3 °C | 14.3 °C | 964.43 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |