Willard, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.5 °F (low) to 66.7 °F (high). Annual precipitation averages 45.9 Inches. Willard is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.0 °F | 42.7 °F | 2.44 in. |
| February | 26.4 °F | 47.6 °F | 2.29 in. |
| March | 34.8 °F | 57.0 °F | 3.78 in. |
| April | 44.4 °F | 66.8 °F | 4.66 in. |
| May | 54.7 °F | 74.9 °F | 5.76 in. |
| June | 63.6 °F | 83.6 °F | 4.56 in. |
| July | 67.7 °F | 88.3 °F | 4.13 in. |
| August | 65.9 °F | 87.9 °F | 3.46 in. |
| September | 57.9 °F | 80.5 °F | 4.63 in. |
| October | 46.0 °F | 69.2 °F | 3.7 in. |
| November | 35.1 °F | 56.4 °F | 3.67 in. |
| December | 26.7 °F | 46.0 °F | 2.77 in. |
| Annual | 45.5 °F | 66.7 °F | 45.85 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |