Whitelaw, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.2 °C (low) to 12.2 °C (high). Annual precipitation averages 815.9 Millimeters. Whitelaw is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.9 °C | -3.7 °C | 37.85 mm |
| February | -10.9 °C | -1.7 °C | 29.97 mm |
| March | -5.4 °C | 4.7 °C | 44.2 mm |
| April | 0.9 °C | 11.3 °C | 80.52 mm |
| May | 7.3 °C | 18.3 °C | 90.93 mm |
| June | 12.9 °C | 23.8 °C | 106.17 mm |
| July | 15.4 °C | 26.4 °C | 93.22 mm |
| August | 14.6 °C | 25.6 °C | 88.39 mm |
| September | 10.2 °C | 21.8 °C | 76.71 mm |
| October | 3.8 °C | 14.2 °C | 73.41 mm |
| November | -2.2 °C | 6.7 °C | 51.05 mm |
| December | -8.2 °C | -0.6 °C | 43.43 mm |
| Annual | 2.2 °C | 12.2 °C | 815.85 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |