Cudahy, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40.7 °F (low) to 55.9 °F (high). Annual precipitation averages 35.9 Inches. Cudahy is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.0 °F | 30.1 °F | 1.81 in. |
| February | 18.8 °F | 33.2 °F | 1.71 in. |
| March | 27.4 °F | 42.8 °F | 2.13 in. |
| April | 37.0 °F | 52.6 °F | 4.18 in. |
| May | 47.4 °F | 64.0 °F | 4.03 in. |
| June | 57.9 °F | 74.3 °F | 4.45 in. |
| July | 64.5 °F | 79.9 °F | 3.42 in. |
| August | 64.2 °F | 78.9 °F | 3.66 in. |
| September | 56.2 °F | 72.2 °F | 3.19 in. |
| October | 44.0 °F | 60.1 °F | 3.06 in. |
| November | 32.6 °F | 47.3 °F | 2.3 in. |
| December | 22.2 °F | 35.3 °F | 1.99 in. |
| Annual | 40.7 °F | 55.9 °F | 35.93 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |