Byers, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.4 °C (low) to 24.1 °C (high). Annual precipitation averages 803.1 Millimeters. Byers is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.5 °C | 12.2 °C | 35.56 mm |
| February | 0.3 °C | 14.4 °C | 43.18 mm |
| March | 5.1 °C | 19.3 °C | 62.74 mm |
| April | 9.4 °C | 23.8 °C | 74.93 mm |
| May | 15.3 °C | 28.2 °C | 107.44 mm |
| June | 20.2 °C | 32.8 °C | 92.71 mm |
| July | 22.2 °C | 35.7 °C | 59.69 mm |
| August | 21.7 °C | 35.7 °C | 64.01 mm |
| September | 17.4 °C | 31.1 °C | 80.26 mm |
| October | 10.7 °C | 25.1 °C | 82.8 mm |
| November | 4.5 °C | 18.3 °C | 53.59 mm |
| December | -0.6 °C | 12.8 °C | 46.23 mm |
| Annual | 10.4 °C | 24.1 °C | 803.14 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |