Schertz, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.4 °C (low) to 26.9 °C (high). Annual precipitation averages 833.4 Millimeters. Schertz is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.4 °C | 17.3 °C | 52.58 mm |
| February | 6.6 °C | 19.7 °C | 49.28 mm |
| March | 10.4 °C | 23.1 °C | 65.28 mm |
| April | 14 °C | 26.7 °C | 63.25 mm |
| May | 18.8 °C | 30.3 °C | 88.9 mm |
| June | 22.2 °C | 33.5 °C | 83.57 mm |
| July | 23.1 °C | 35 °C | 49.28 mm |
| August | 23.1 °C | 35.7 °C | 53.59 mm |
| September | 20.3 °C | 32.5 °C | 92.2 mm |
| October | 15 °C | 28.1 °C | 107.19 mm |
| November | 9.4 °C | 22.3 °C | 70.61 mm |
| December | 5.4 °C | 18.1 °C | 57.66 mm |
| Annual | 14.4 °C | 26.9 °C | 833.39 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |