Zoar, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.3 °C (low) to 11.4 °C (high). Annual precipitation averages 825 Millimeters. Zoar is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -15.3 °C | -5.1 °C | 28.96 mm |
| February | -14.4 °C | -2.7 °C | 26.67 mm |
| March | -8.2 °C | 3.7 °C | 42.16 mm |
| April | -1.2 °C | 11.3 °C | 75.69 mm |
| May | 5.6 °C | 18.7 °C | 92.2 mm |
| June | 11.2 °C | 23.8 °C | 113.28 mm |
| July | 13.3 °C | 26.1 °C | 95.76 mm |
| August | 12.3 °C | 25.1 °C | 90.17 mm |
| September | 7.8 °C | 20.7 °C | 93.98 mm |
| October | 1.4 °C | 13.1 °C | 78.99 mm |
| November | -4.6 °C | 4.8 °C | 48.01 mm |
| December | -11.2 °C | -2.2 °C | 39.12 mm |
| Annual | -0.3 °C | 11.4 °C | 824.99 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |