Willard, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.9 °C (low) to 18.8 °C (high). Annual precipitation averages 922.8 Millimeters. Willard is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.7 °C | 4.3 °C | 20.07 mm |
| February | -4.7 °C | 7 °C | 30.73 mm |
| March | 0.7 °C | 13.4 °C | 54.36 mm |
| April | 6.4 °C | 19.2 °C | 93.22 mm |
| May | 12.7 °C | 24.2 °C | 129.29 mm |
| June | 18.2 °C | 29.1 °C | 129.54 mm |
| July | 20.2 °C | 31.2 °C | 109.22 mm |
| August | 18.9 °C | 30.8 °C | 115.57 mm |
| September | 14 °C | 26.9 °C | 90.68 mm |
| October | 7.2 °C | 20.4 °C | 72.9 mm |
| November | 0.9 °C | 13.2 °C | 42.93 mm |
| December | -4.6 °C | 6.2 °C | 34.29 mm |
| Annual | 6.9 °C | 18.8 °C | 922.8 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |