Walsenburg, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 2.4 °C (low) to 19.1 °C (high). Annual precipitation averages 414.5 Millimeters. Walsenburg is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7 °C | 8.5 °C | 16.76 mm |
| February | -6.4 °C | 9.7 °C | 19.81 mm |
| March | -2.9 °C | 13.9 °C | 39.88 mm |
| April | 0.7 °C | 17.6 °C | 45.72 mm |
| May | 5.7 °C | 22.6 °C | 48.26 mm |
| June | 10.8 °C | 28.7 °C | 28.7 mm |
| July | 13.9 °C | 30.8 °C | 62.48 mm |
| August | 12.9 °C | 29.6 °C | 54.86 mm |
| September | 8.7 °C | 26.3 °C | 23.37 mm |
| October | 2.3 °C | 20.2 °C | 31.75 mm |
| November | -2.9 °C | 13.4 °C | 20.57 mm |
| December | -7.2 °C | 8.1 °C | 22.35 mm |
| Annual | 2.4 °C | 19.1 °C | 414.51 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |