Avoca, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.6 °F (low) to 57.1 °F (high). Annual precipitation averages 37.4 Inches. 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 | 8.3 °F | 27.4 °F | 1.28 in. |
| February | 11.2 °F | 31.7 °F | 1.3 in. |
| March | 22.7 °F | 44.0 °F | 2.07 in. |
| April | 34.7 °F | 57.3 °F | 3.83 in. |
| May | 46.3 °F | 69.5 °F | 4.54 in. |
| June | 56.8 °F | 78.9 °F | 5.49 in. |
| July | 60.6 °F | 82.5 °F | 4.88 in. |
| August | 58.5 °F | 80.9 °F | 4.02 in. |
| September | 49.5 °F | 73.5 °F | 3.74 in. |
| October | 37.2 °F | 60.8 °F | 2.63 in. |
| November | 26.1 °F | 45.4 °F | 2.07 in. |
| December | 15.3 °F | 32.8 °F | 1.58 in. |
| Annual | 35.6 °F | 57.1 °F | 37.43 in. |
| 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 : -25°F to -20°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 |