Kirbyville, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46 °F (low) to 68.7 °F (high). Annual precipitation averages 46.5 Inches. Kirbyville is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.1 °F | 46.0 °F | 2.82 in. |
| February | 28.1 °F | 50.5 °F | 2.59 in. |
| March | 35.8 °F | 59.5 °F | 4.21 in. |
| April | 44.8 °F | 69.0 °F | 5.27 in. |
| May | 54.5 °F | 76.7 °F | 5.2 in. |
| June | 63.3 °F | 85.2 °F | 4.25 in. |
| July | 67.0 °F | 89.5 °F | 4.03 in. |
| August | 65.4 °F | 88.6 °F | 3.18 in. |
| September | 57.7 °F | 81.5 °F | 4.48 in. |
| October | 46.2 °F | 70.6 °F | 3.77 in. |
| November | 36.2 °F | 58.8 °F | 3.93 in. |
| December | 28.3 °F | 48.6 °F | 2.77 in. |
| Annual | 46 °F | 68.7 °F | 46.5 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 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 |