Black River Falls, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.9 °C (low) to 13.5 °C (high). Annual precipitation averages 962.4 Millimeters. Black River Falls is located in USDA Plant Hardiness Zone 4b. 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 | -14.7 °C | -3.6 °C | 31.24 mm |
| February | -13.1 °C | -0.8 °C | 29.97 mm |
| March | -6.4 °C | 6 °C | 46.99 mm |
| April | 0.3 °C | 13.9 °C | 93.98 mm |
| May | 7.2 °C | 20.8 °C | 119.89 mm |
| June | 12.7 °C | 25.9 °C | 145.54 mm |
| July | 14.8 °C | 28.1 °C | 112.01 mm |
| August | 13.6 °C | 26.9 °C | 119.38 mm |
| September | 8.9 °C | 22.9 °C | 98.55 mm |
| October | 2.2 °C | 15.4 °C | 79.76 mm |
| November | -4.2 °C | 6.6 °C | 45.47 mm |
| December | -10.5 °C | -0.7 °C | 39.62 mm |
| Annual | 0.9 °C | 13.5 °C | 962.4 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 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |