Sterling City, Texas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 10 °C (low) to 25.5 °C (high). Annual precipitation averages 485.7 Millimeters. Sterling City is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.2 °C | 14.6 °C | 22.86 mm |
| February | 0.7 °C | 17.2 °C | 25.15 mm |
| March | 5.1 °C | 21.6 °C | 32 mm |
| April | 9.3 °C | 26.4 °C | 30.73 mm |
| May | 15.3 °C | 30.6 °C | 60.45 mm |
| June | 19.7 °C | 33.7 °C | 52.83 mm |
| July | 20.9 °C | 35 °C | 37.85 mm |
| August | 20.4 °C | 34.9 °C | 55.63 mm |
| September | 16.4 °C | 31 °C | 61.21 mm |
| October | 10.5 °C | 26.3 °C | 54.61 mm |
| November | 3.9 °C | 19.7 °C | 31.5 mm |
| December | -0.5 °C | 15.3 °C | 20.83 mm |
| Annual | 10 °C | 25.5 °C | 485.65 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |