Vega, Texas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 5.2 °C (low) to 21.7 °C (high). Annual precipitation averages 471.9 Millimeters. Vega is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.9 °C | 10.2 °C | 14.22 mm |
| February | -4.6 °C | 12.6 °C | 12.45 mm |
| March | -0.8 °C | 16.9 °C | 29.97 mm |
| April | 3.6 °C | 21.3 °C | 28.7 mm |
| May | 9.3 °C | 26.6 °C | 56.13 mm |
| June | 14.9 °C | 31.8 °C | 73.66 mm |
| July | 17.3 °C | 33 °C | 64.77 mm |
| August | 16.7 °C | 32.2 °C | 69.6 mm |
| September | 12.3 °C | 28.2 °C | 41.4 mm |
| October | 5.6 °C | 22.2 °C | 44.2 mm |
| November | -1 °C | 15.4 °C | 17.78 mm |
| December | -5.1 °C | 10.3 °C | 19.05 mm |
| Annual | 5.2 °C | 21.7 °C | 471.93 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |