Waunakee, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.9 °C (low) to 13.7 °C (high). Annual precipitation averages 961.1 Millimeters. Waunakee 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 | -11.9 °C | -2.8 °C | 37.34 mm |
| February | -10.2 °C | -0.4 °C | 38.35 mm |
| March | -4.4 °C | 6.2 °C | 53.59 mm |
| April | 2 °C | 13.8 °C | 97.03 mm |
| May | 8.6 °C | 20.5 °C | 111.25 mm |
| June | 14.2 °C | 25.8 °C | 141.48 mm |
| July | 16.4 °C | 27.9 °C | 114.05 mm |
| August | 15.3 °C | 26.9 °C | 106.68 mm |
| September | 10.6 °C | 22.9 °C | 89.66 mm |
| October | 4.2 °C | 15.8 °C | 73.15 mm |
| November | -2.2 °C | 7.2 °C | 55.37 mm |
| December | -8 °C | 0.3 °C | 43.18 mm |
| Annual | 2.9 °C | 13.7 °C | 961.13 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 |