Poynette, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.7 °C (low) to 13.8 °C (high). Annual precipitation averages 942.9 Millimeters. Poynette 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 | -12.2 °C | -2.8 °C | 33.53 mm |
| February | -10.7 °C | -0.3 °C | 35.05 mm |
| March | -4.8 °C | 6.3 °C | 53.59 mm |
| April | 1.7 °C | 13.9 °C | 99.82 mm |
| May | 8.4 °C | 20.7 °C | 111 mm |
| June | 14.2 °C | 26.1 °C | 136.91 mm |
| July | 16.3 °C | 28.1 °C | 109.98 mm |
| August | 15.1 °C | 27.1 °C | 102.62 mm |
| September | 10.5 °C | 22.9 °C | 91.19 mm |
| October | 4.1 °C | 15.6 °C | 72.9 mm |
| November | -2.3 °C | 7.2 °C | 53.59 mm |
| December | -8.2 °C | 0.3 °C | 42.67 mm |
| Annual | 2.7 °C | 13.8 °C | 942.85 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 |