Clinton, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.6 °F (low) to 57 °F (high). Annual precipitation averages 37.4 Inches. Clinton is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.2 °F | 27.9 °F | 1.5 in. |
| February | 15.3 °F | 31.8 °F | 1.56 in. |
| March | 25.2 °F | 43.8 °F | 2.11 in. |
| April | 35.5 °F | 57.2 °F | 3.8 in. |
| May | 47.1 °F | 68.5 °F | 4.15 in. |
| June | 57.0 °F | 78.4 °F | 5.62 in. |
| July | 61.0 °F | 81.9 °F | 3.76 in. |
| August | 59.1 °F | 80.4 °F | 3.95 in. |
| September | 51.3 °F | 73.9 °F | 3.77 in. |
| October | 39.6 °F | 60.9 °F | 2.97 in. |
| November | 29.0 °F | 46.0 °F | 2.28 in. |
| December | 18.3 °F | 33.4 °F | 1.94 in. |
| Annual | 37.6 °F | 57 °F | 37.41 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |