Biron, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.2 °C (low) to 12.6 °C (high). Annual precipitation averages 855.7 Millimeters. Biron 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 | -14.2 °C | -4.1 °C | 29.97 mm |
| February | -12.6 °C | -1.5 °C | 27.43 mm |
| March | -6.5 °C | 5.1 °C | 45.72 mm |
| April | 0.6 °C | 13 °C | 84.84 mm |
| May | 7.3 °C | 19.9 °C | 100.58 mm |
| June | 12.9 °C | 24.9 °C | 120.14 mm |
| July | 14.9 °C | 27.4 °C | 97.54 mm |
| August | 13.7 °C | 26.2 °C | 103.89 mm |
| September | 9.2 °C | 22 °C | 89.92 mm |
| October | 2.8 °C | 14.2 °C | 69.09 mm |
| November | -3.7 °C | 5.9 °C | 46.99 mm |
| December | -10.2 °C | -1.3 °C | 39.62 mm |
| Annual | 1.2 °C | 12.6 °C | 855.73 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 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |