Blanchardville, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.5 °C (low) to 14.3 °C (high). Annual precipitation averages 952 Millimeters. Blanchardville is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.3 °C | -2.3 °C | 35.31 mm |
| February | -10.6 °C | 0.1 °C | 37.85 mm |
| March | -4.6 °C | 6.8 °C | 52.07 mm |
| April | 1.7 °C | 14.7 °C | 96.27 mm |
| May | 8 °C | 21.1 °C | 108.2 mm |
| June | 13.8 °C | 26.6 °C | 140.21 mm |
| July | 15.9 °C | 28.4 °C | 110.74 mm |
| August | 14.8 °C | 27.6 °C | 105.92 mm |
| September | 10 °C | 23.7 °C | 93.98 mm |
| October | 3.8 °C | 16.5 °C | 71.12 mm |
| November | -2.4 °C | 7.8 °C | 58.42 mm |
| December | -8.2 °C | 0.8 °C | 41.91 mm |
| Annual | 2.5 °C | 14.3 °C | 952 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |