Westcreek, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -1 °C (low) to 14.9 °C (high). Annual precipitation averages 481.3 Millimeters. Westcreek is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.3 °C | 4.9 °C | 16 mm |
| February | -9.8 °C | 5.3 °C | 18.03 mm |
| March | -6.1 °C | 9.4 °C | 39.37 mm |
| April | -2.8 °C | 12.6 °C | 53.34 mm |
| May | 2 °C | 17.6 °C | 53.34 mm |
| June | 7.1 °C | 24.2 °C | 45.21 mm |
| July | 10.1 °C | 27.1 °C | 72.64 mm |
| August | 9.4 °C | 25.7 °C | 78.23 mm |
| September | 5.2 °C | 22.2 °C | 41.91 mm |
| October | -0.8 °C | 15.8 °C | 27.18 mm |
| November | -6.1 °C | 9.2 °C | 19.56 mm |
| December | -10.3 °C | 4.7 °C | 16.51 mm |
| Annual | -1 °C | 14.9 °C | 481.32 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |