Crested Butte, Colorado has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from -7.3 °C (low) to 10.6 °C (high). Annual precipitation averages 664.2 Millimeters. Crested Butte is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around Jun. 11 - Jun. 20 through the first frost around Aug. 1 - Aug. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -20.3 °C | -2.4 °C | 72.14 mm |
| February | -18.2 °C | -0.2 °C | 72.14 mm |
| March | -13.2 °C | 4.4 °C | 63.5 mm |
| April | -7.2 °C | 8.8 °C | 61.98 mm |
| May | -2.3 °C | 14.6 °C | 45.72 mm |
| June | 1.1 °C | 21.2 °C | 25.15 mm |
| July | 4.6 °C | 24.2 °C | 50.55 mm |
| August | 4 °C | 22.8 °C | 51.05 mm |
| September | 0.1 °C | 19.1 °C | 52.58 mm |
| October | -5.1 °C | 12.4 °C | 49.02 mm |
| November | -11.8 °C | 4.5 °C | 57.4 mm |
| December | -19 °C | -2.2 °C | 62.99 mm |
| Annual | -7.3 °C | 10.6 °C | 664.22 mm |
| Average First Frost Date | Aug. 1 - Aug. 10 |
| Average Last Frost Date | Jun. 11 - Jun. 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |