Brandon, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.4 °C (low) to 12.7 °C (high). Annual precipitation averages 846.6 Millimeters. Brandon 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 | -12.4 °C | -3.8 °C | 32.77 mm |
| February | -11.1 °C | -1.8 °C | 29.97 mm |
| March | -4.9 °C | 4.9 °C | 45.72 mm |
| April | 1.4 °C | 12.5 °C | 85.6 mm |
| May | 7.9 °C | 19.7 °C | 97.03 mm |
| June | 13.6 °C | 24.9 °C | 123.7 mm |
| July | 15.8 °C | 26.8 °C | 99.57 mm |
| August | 14.7 °C | 25.9 °C | 92.2 mm |
| September | 10.4 °C | 22.2 °C | 80.26 mm |
| October | 3.8 °C | 14.8 °C | 71.37 mm |
| November | -2.4 °C | 6.6 °C | 50.04 mm |
| December | -8.6 °C | -0.7 °C | 38.35 mm |
| Annual | 2.4 °C | 12.7 °C | 846.58 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |