Wisconsin Dells, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.6 °F (low) to 56.2 °F (high). Annual precipitation averages 36.9 Inches. Wisconsin Dells is located in USDA Plant Hardiness Zone 5a. 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 | 8.8 °F | 26.4 °F | 1.23 in. |
| February | 11.4 °F | 30.7 °F | 1.29 in. |
| March | 22.2 °F | 42.9 °F | 2.13 in. |
| April | 33.9 °F | 56.4 °F | 4.1 in. |
| May | 46.1 °F | 68.6 °F | 4.31 in. |
| June | 56.4 °F | 78.1 °F | 5.23 in. |
| July | 60.3 °F | 82.1 °F | 4.07 in. |
| August | 57.9 °F | 80.1 °F | 4.14 in. |
| September | 49.7 °F | 72.8 °F | 3.73 in. |
| October | 37.9 °F | 59.5 °F | 2.93 in. |
| November | 26.7 °F | 44.5 °F | 1.98 in. |
| December | 16.0 °F | 31.9 °F | 1.73 in. |
| Annual | 35.6 °F | 56.2 °F | 36.87 in. |
| 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 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |