Brodhead, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.4 °F (low) to 57.7 °F (high). Annual precipitation averages 38 Inches. 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 | 11.3 °F | 28.0 °F | 1.58 in. |
| February | 14.3 °F | 32.1 °F | 1.7 in. |
| March | 24.9 °F | 44.3 °F | 2.06 in. |
| April | 35.8 °F | 58.1 °F | 3.78 in. |
| May | 47.6 °F | 69.8 °F | 4.21 in. |
| June | 57.7 °F | 79.7 °F | 5.49 in. |
| July | 61.4 °F | 82.9 °F | 3.9 in. |
| August | 59.4 °F | 81.3 °F | 4.37 in. |
| September | 50.8 °F | 74.6 °F | 3.76 in. |
| October | 39.4 °F | 61.6 °F | 2.91 in. |
| November | 28.4 °F | 46.2 °F | 2.29 in. |
| December | 17.9 °F | 33.4 °F | 1.92 in. |
| Annual | 37.4 °F | 57.7 °F | 37.97 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |