Cobb, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.2 °C (low) to 13.3 °C (high). Annual precipitation averages 986.3 Millimeters. Cobb 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 | -11.8 °C | -3.3 °C | 35.05 mm |
| February | -9.9 °C | -0.8 °C | 36.07 mm |
| March | -3.7 °C | 6 °C | 54.1 mm |
| April | 2.4 °C | 13.7 °C | 98.81 mm |
| May | 8.9 °C | 20.1 °C | 115.57 mm |
| June | 14.6 °C | 25.3 °C | 146.81 mm |
| July | 16.8 °C | 27.3 °C | 121.16 mm |
| August | 15.6 °C | 26.4 °C | 106.17 mm |
| September | 11 °C | 22.6 °C | 97.79 mm |
| October | 4.5 °C | 15.4 °C | 73.41 mm |
| November | -1.7 °C | 7.3 °C | 57.4 mm |
| December | -7.9 °C | -0.1 °C | 43.94 mm |
| Annual | 3.2 °C | 13.3 °C | 986.28 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |