Ellsworth, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.3 °F (low) to 53.2 °F (high). Annual precipitation averages 35.3 Inches. Ellsworth 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.8 °F | 21.8 °F | 1.0 in. |
| February | 7.2 °F | 26.7 °F | 0.97 in. |
| March | 19.5 °F | 39.3 °F | 1.86 in. |
| April | 32.4 °F | 54.7 °F | 2.98 in. |
| May | 45.0 °F | 66.9 °F | 4.4 in. |
| June | 55.4 °F | 75.8 °F | 5.2 in. |
| July | 59.5 °F | 79.9 °F | 4.17 in. |
| August | 57.1 °F | 77.7 °F | 4.98 in. |
| September | 48.9 °F | 70.9 °F | 3.8 in. |
| October | 36.1 °F | 57.1 °F | 2.78 in. |
| November | 23.6 °F | 40.5 °F | 1.84 in. |
| December | 11.3 °F | 27.0 °F | 1.32 in. |
| Annual | 33.3 °F | 53.2 °F | 35.3 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 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 | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |