Downing, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.9 °C (low) to 12 °C (high). Annual precipitation averages 861.6 Millimeters. Downing 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -15.3 °C | -5.4 °C | 24.64 mm |
| February | -13.7 °C | -2.7 °C | 24.89 mm |
| March | -6.8 °C | 4.2 °C | 45.47 mm |
| April | 0.4 °C | 12.4 °C | 76.45 mm |
| May | 7.3 °C | 19.6 °C | 104.14 mm |
| June | 13.1 °C | 24.7 °C | 127.76 mm |
| July | 15.3 °C | 27.1 °C | 105.66 mm |
| August | 13.9 °C | 25.9 °C | 112.78 mm |
| September | 9.4 °C | 21.8 °C | 90.68 mm |
| October | 2.6 °C | 13.9 °C | 71.63 mm |
| November | -4.1 °C | 5 °C | 43.94 mm |
| December | -11.1 °C | -2.5 °C | 33.53 mm |
| Annual | 0.9 °C | 12 °C | 861.57 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 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |