McClave, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 3 °C (low) to 20.4 °C (high). Annual precipitation averages 353.6 Millimeters. McClave is located in USDA Plant Hardiness Zone 6a. 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 | -9.5 °C | 7.6 °C | 6.86 mm |
| February | -7.6 °C | 9.4 °C | 7.87 mm |
| March | -2.9 °C | 15.4 °C | 17.78 mm |
| April | 1.7 °C | 19.5 °C | 31.24 mm |
| May | 7.8 °C | 24.7 °C | 46.23 mm |
| June | 13.9 °C | 30.9 °C | 51.31 mm |
| July | 16.9 °C | 33.6 °C | 64.77 mm |
| August | 15.8 °C | 32.2 °C | 59.18 mm |
| September | 10.7 °C | 28.2 °C | 24.64 mm |
| October | 2.4 °C | 21.2 °C | 24.38 mm |
| November | -4.3 °C | 13.7 °C | 9.91 mm |
| December | -9.1 °C | 7.8 °C | 9.4 mm |
| Annual | 3 °C | 20.4 °C | 353.57 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |