Von Ormy, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.9 °C (low) to 27.7 °C (high). Annual precipitation averages 784.1 Millimeters. Von Ormy is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.8 °C | 18.2 °C | 50.29 mm |
| February | 7.2 °C | 20.7 °C | 44.2 mm |
| March | 10.9 °C | 24.1 °C | 59.94 mm |
| April | 14.6 °C | 27.8 °C | 51.31 mm |
| May | 19.3 °C | 31.3 °C | 101.09 mm |
| June | 22.5 °C | 34.3 °C | 79.76 mm |
| July | 23.4 °C | 35.7 °C | 55.63 mm |
| August | 23.3 °C | 36.4 °C | 60.71 mm |
| September | 20.8 °C | 33.3 °C | 90.42 mm |
| October | 15.7 °C | 28.9 °C | 84.33 mm |
| November | 10.1 °C | 23.1 °C | 56.64 mm |
| December | 5.9 °C | 19 °C | 49.78 mm |
| Annual | 14.9 °C | 27.7 °C | 784.1 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |