| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 53a - Rock River Drift Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 53520 - Brodhead, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 12 | 23 | 35 | 46 | 55 | 60 | 57 | 48 | 37 | 26 | 13 | 35 |
| Avg Max Temp (°F) | 26 | 31 | 43 | 57 | 70 | 80 | 83 | 80 | 73 | 61 | 45 | 31 | 57 |
| Avg Precip (In.) | 1.33 | 1.37 | 2.27 | 3.46 | 3.62 | 4.6 | 3.96 | 4.24 | 3.55 | 2.66 | 2.42 | 1.8 | 35.29 |