Poy Sippi, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.1 °C (low) to 13 °C (high). Annual precipitation averages 855.5 Millimeters. Poy Sippi 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 | -12.7 °C | -3.4 °C | 33.78 mm |
| February | -11.4 °C | -1.2 °C | 28.7 mm |
| March | -5.4 °C | 5.2 °C | 49.53 mm |
| April | 1.1 °C | 12.8 °C | 91.19 mm |
| May | 7.9 °C | 19.7 °C | 102.62 mm |
| June | 13.6 °C | 25.2 °C | 116.08 mm |
| July | 15.8 °C | 27.7 °C | 91.95 mm |
| August | 14.7 °C | 26.6 °C | 95.76 mm |
| September | 9.9 °C | 22.4 °C | 83.82 mm |
| October | 3.4 °C | 14.8 °C | 70.1 mm |
| November | -2.7 °C | 6.7 °C | 48.01 mm |
| December | -8.8 °C | -0.4 °C | 43.94 mm |
| Annual | 2.1 °C | 13 °C | 855.48 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 | Dfb - Humid Continental Mild Summer, Wet All Year |