Packwaukee, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.9 °C (low) to 13.5 °C (high). Annual precipitation averages 910.1 Millimeters. Packwaukee 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 | -13.1 °C | -2.9 °C | 34.54 mm |
| February | -11.6 °C | -0.5 °C | 32.26 mm |
| March | -5.6 °C | 6.1 °C | 48.77 mm |
| April | 1 °C | 13.5 °C | 93.98 mm |
| May | 7.8 °C | 20.4 °C | 108.97 mm |
| June | 13.4 °C | 25.7 °C | 130.05 mm |
| July | 15.6 °C | 27.8 °C | 107.19 mm |
| August | 14.3 °C | 26.8 °C | 100.58 mm |
| September | 9.6 °C | 22.7 °C | 88.14 mm |
| October | 3.1 °C | 15.3 °C | 71.88 mm |
| November | -3.1 °C | 7.1 °C | 51.56 mm |
| December | -9.1 °C | -0.1 °C | 42.16 mm |
| Annual | 1.9 °C | 13.5 °C | 910.08 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 |