Asherton, Texas has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 15.2 °C (low) to 29.1 °C (high). Annual precipitation averages 531.6 Millimeters. Asherton 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 Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.2 °C | 19.3 °C | 25.4 mm |
| February | 7.6 °C | 22.1 °C | 21.34 mm |
| March | 11.7 °C | 25.9 °C | 40.89 mm |
| April | 15.2 °C | 30 °C | 38.35 mm |
| May | 19.8 °C | 33.3 °C | 77.47 mm |
| June | 22.8 °C | 36.2 °C | 55.37 mm |
| July | 23.4 °C | 37.2 °C | 42.16 mm |
| August | 23.6 °C | 37.4 °C | 36.83 mm |
| September | 21 °C | 34.1 °C | 84.84 mm |
| October | 16.1 °C | 29.9 °C | 51.56 mm |
| November | 10.4 °C | 23.9 °C | 31.75 mm |
| December | 5.9 °C | 19.9 °C | 25.65 mm |
| Annual | 15.2 °C | 29.1 °C | 531.61 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 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 | Normal |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |