Blanca, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 26.9 °F (low) to 59.1 °F (high). Annual precipitation averages 9.7 Inches. Blanca is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.4 °F | 34.8 °F | 0.35 in. |
| February | 11.0 °F | 40.4 °F | 0.34 in. |
| March | 19.9 °F | 50.7 °F | 0.71 in. |
| April | 26.4 °F | 58.1 °F | 0.76 in. |
| May | 35.2 °F | 67.3 °F | 1.08 in. |
| June | 43.5 °F | 77.9 °F | 0.75 in. |
| July | 48.8 °F | 81.5 °F | 1.57 in. |
| August | 46.8 °F | 79.1 °F | 1.43 in. |
| September | 39.3 °F | 73.4 °F | 1.11 in. |
| October | 27.8 °F | 62.0 °F | 0.8 in. |
| November | 15.7 °F | 48.1 °F | 0.43 in. |
| December | 5.4 °F | 35.9 °F | 0.41 in. |
| Annual | 26.9 °F | 59.1 °F | 9.74 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |