Smyer, Texas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 7.6 °C (low) to 23.5 °C (high). Annual precipitation averages 475.2 Millimeters. Smyer is located in USDA Plant Hardiness Zone 7b. 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 | -3.7 °C | 12.5 °C | 17.27 mm |
| February | -2 °C | 15.1 °C | 14.99 mm |
| March | 2.1 °C | 19.6 °C | 29.97 mm |
| April | 6.4 °C | 24 °C | 28.96 mm |
| May | 12.3 °C | 28.5 °C | 64.01 mm |
| June | 17.6 °C | 32.7 °C | 66.29 mm |
| July | 19.3 °C | 33.7 °C | 51.56 mm |
| August | 18.4 °C | 32.8 °C | 53.34 mm |
| September | 14.4 °C | 28.9 °C | 66.8 mm |
| October | 7.9 °C | 24.1 °C | 41.15 mm |
| November | 1.3 °C | 17.6 °C | 21.84 mm |
| December | -2.8 °C | 13 °C | 19.05 mm |
| Annual | 7.6 °C | 23.5 °C | 475.23 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |