Avoca, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2 °C (low) to 13.9 °C (high). Annual precipitation averages 950.7 Millimeters. Avoca 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 | -13.2 °C | -2.6 °C | 32.51 mm |
| February | -11.6 °C | -0.2 °C | 33.02 mm |
| March | -5.2 °C | 6.7 °C | 52.58 mm |
| April | 1.5 °C | 14.1 °C | 97.28 mm |
| May | 7.9 °C | 20.8 °C | 115.32 mm |
| June | 13.8 °C | 26.1 °C | 139.45 mm |
| July | 15.9 °C | 28.1 °C | 123.95 mm |
| August | 14.7 °C | 27.2 °C | 102.11 mm |
| September | 9.7 °C | 23.1 °C | 95 mm |
| October | 2.9 °C | 16 °C | 66.8 mm |
| November | -3.3 °C | 7.4 °C | 52.58 mm |
| December | -9.3 °C | 0.4 °C | 40.13 mm |
| Annual | 2 °C | 13.9 °C | 950.73 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 4b : -31.7°C to -28.9°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 |