Ouray, Colorado has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from -1.6 °C (low) to 13.8 °C (high). Annual precipitation averages 592.6 Millimeters. Ouray is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.4 °C | 2.6 °C | 42.67 mm |
| February | -10.1 °C | 4.1 °C | 46.48 mm |
| March | -6.3 °C | 8.4 °C | 59.94 mm |
| April | -2.7 °C | 12.1 °C | 62.48 mm |
| May | 1.7 °C | 17.6 °C | 44.45 mm |
| June | 5.7 °C | 23.9 °C | 22.35 mm |
| July | 9.1 °C | 25.9 °C | 58.93 mm |
| August | 8.6 °C | 24.5 °C | 61.98 mm |
| September | 4.8 °C | 21.2 °C | 53.85 mm |
| October | -0.9 °C | 14.9 °C | 51.56 mm |
| November | -6.6 °C | 8 °C | 45.47 mm |
| December | -11.2 °C | 2.4 °C | 42.42 mm |
| Annual | -1.6 °C | 13.8 °C | 592.58 mm |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 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 | Dfc - Subarctic With Cool Summers And Year Around Rainfall |