Hornersville, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.3 °C (low) to 21.2 °C (high). Annual precipitation averages 1323.1 Millimeters. Hornersville is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.6 °C | 7.6 °C | 90.68 mm |
| February | 0.3 °C | 10.4 °C | 112.01 mm |
| March | 4.6 °C | 15.5 °C | 126.24 mm |
| April | 9.9 °C | 21.7 °C | 135.13 mm |
| May | 15.8 °C | 26.7 °C | 135.13 mm |
| June | 20.3 °C | 31.2 °C | 92.2 mm |
| July | 22.1 °C | 32.6 °C | 110.49 mm |
| August | 20.9 °C | 32.1 °C | 89.15 mm |
| September | 16.6 °C | 28.9 °C | 82.55 mm |
| October | 10.1 °C | 23.1 °C | 103.12 mm |
| November | 4.4 °C | 15.4 °C | 122.94 mm |
| December | 0.3 °C | 9.4 °C | 123.44 mm |
| Annual | 10.3 °C | 21.2 °C | 1323.08 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |