Blanco, New Mexico has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 2.8 °C (low) to 20.1 °C (high). Annual precipitation averages 226.1 Millimeters. Blanco 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 | -7.7 °C | 6.3 °C | 18.8 mm |
| February | -5.4 °C | 9.9 °C | 16.76 mm |
| March | -2.1 °C | 15.3 °C | 18.29 mm |
| April | 1.1 °C | 20.1 °C | 16.51 mm |
| May | 5.8 °C | 25.3 °C | 15.49 mm |
| June | 10.9 °C | 30.3 °C | 6.6 mm |
| July | 15.3 °C | 33.7 °C | 21.84 mm |
| August | 14.1 °C | 32.1 °C | 28.45 mm |
| September | 9.4 °C | 28.1 °C | 26.92 mm |
| October | 2.4 °C | 20.3 °C | 21.59 mm |
| November | -3.2 °C | 12.7 °C | 17.02 mm |
| December | -7.4 °C | 6.6 °C | 17.78 mm |
| Annual | 2.8 °C | 20.1 °C | 226.05 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |