Biron, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.1 °F (low) to 54.8 °F (high). Annual precipitation averages 33.7 Inches. 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 | 6.5 °F | 24.6 °F | 1.18 in. |
| February | 9.3 °F | 29.3 °F | 1.08 in. |
| March | 20.3 °F | 41.2 °F | 1.8 in. |
| April | 33.0 °F | 55.4 °F | 3.34 in. |
| May | 45.2 °F | 67.8 °F | 3.96 in. |
| June | 55.3 °F | 76.8 °F | 4.73 in. |
| July | 58.9 °F | 81.3 °F | 3.84 in. |
| August | 56.6 °F | 79.1 °F | 4.09 in. |
| September | 48.5 °F | 71.6 °F | 3.54 in. |
| October | 37.0 °F | 57.6 °F | 2.72 in. |
| November | 25.4 °F | 42.6 °F | 1.85 in. |
| December | 13.7 °F | 29.7 °F | 1.56 in. |
| Annual | 34.1 °F | 54.8 °F | 33.69 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |