Slinger, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.9 °C (low) to 12.8 °C (high). Annual precipitation averages 912.6 Millimeters. 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 | -12.3 °C | -3.3 °C | 44.45 mm |
| February | -10.7 °C | -1.2 °C | 39.88 mm |
| March | -5.3 °C | 5.3 °C | 51.56 mm |
| April | 0.8 °C | 12.5 °C | 95.25 mm |
| May | 6.9 °C | 19.2 °C | 102.62 mm |
| June | 12.4 °C | 24.4 °C | 109.98 mm |
| July | 15.1 °C | 27 °C | 104.65 mm |
| August | 14.1 °C | 25.8 °C | 102.11 mm |
| September | 9.7 °C | 22 °C | 82.04 mm |
| October | 3.5 °C | 14.8 °C | 76.45 mm |
| November | -2.7 °C | 6.7 °C | 53.09 mm |
| December | -8.4 °C | -0.1 °C | 50.55 mm |
| Annual | 1.9 °C | 12.8 °C | 912.63 mm |
| 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 : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |