Clintonville, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.8 °F (low) to 54.8 °F (high). Annual precipitation averages 33 Inches. Clintonville 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 | 8.5 °F | 25.2 °F | 1.27 in. |
| February | 10.1 °F | 29.0 °F | 1.1 in. |
| March | 20.9 °F | 40.5 °F | 1.82 in. |
| April | 33.0 °F | 54.5 °F | 3.0 in. |
| May | 45.1 °F | 67.4 °F | 3.75 in. |
| June | 55.2 °F | 76.8 °F | 4.45 in. |
| July | 59.3 °F | 81.2 °F | 3.96 in. |
| August | 57.3 °F | 79.3 °F | 3.7 in. |
| September | 48.9 °F | 71.6 °F | 3.58 in. |
| October | 37.3 °F | 58.0 °F | 2.9 in. |
| November | 26.6 °F | 43.4 °F | 1.87 in. |
| December | 15.3 °F | 30.3 °F | 1.6 in. |
| Annual | 34.8 °F | 54.8 °F | 33 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |