Brooklyn, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.2 °C (low) to 13.6 °C (high). Annual precipitation averages 966.2 Millimeters. Brooklyn is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.6 °C | -2.8 °C | 39.12 mm |
| February | -9.7 °C | -0.5 °C | 40.89 mm |
| March | -3.9 °C | 6.2 °C | 54.1 mm |
| April | 2.3 °C | 13.8 °C | 97.03 mm |
| May | 8.9 °C | 20.5 °C | 110.49 mm |
| June | 14.4 °C | 25.7 °C | 139.95 mm |
| July | 16.7 °C | 27.8 °C | 106.17 mm |
| August | 15.8 °C | 26.8 °C | 108.46 mm |
| September | 10.9 °C | 22.9 °C | 92.46 mm |
| October | 4.4 °C | 15.7 °C | 73.91 mm |
| November | -1.8 °C | 7.3 °C | 58.42 mm |
| December | -7.8 °C | 0.3 °C | 45.21 mm |
| Annual | 3.2 °C | 13.6 °C | 966.21 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |