Slinger, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35.5 °F (low) to 55 °F (high). Annual precipitation averages 35.9 Inches. Slinger 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 | 9.9 °F | 26.1 °F | 1.75 in. |
| February | 12.7 °F | 29.8 °F | 1.57 in. |
| March | 22.5 °F | 41.5 °F | 2.03 in. |
| April | 33.5 °F | 54.5 °F | 3.75 in. |
| May | 44.5 °F | 66.6 °F | 4.04 in. |
| June | 54.3 °F | 76.0 °F | 4.33 in. |
| July | 59.2 °F | 80.6 °F | 4.12 in. |
| August | 57.3 °F | 78.5 °F | 4.02 in. |
| September | 49.4 °F | 71.6 °F | 3.23 in. |
| October | 38.3 °F | 58.6 °F | 3.01 in. |
| November | 27.2 °F | 44.1 °F | 2.09 in. |
| December | 16.9 °F | 31.8 °F | 1.99 in. |
| Annual | 35.5 °F | 55 °F | 35.93 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |