Dolores, Colorado has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 0.7 °C (low) to 16 °C (high). Annual precipitation averages 437.9 Millimeters. Dolores is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.3 °C | 4.2 °C | 42.93 mm |
| February | -7.4 °C | 5.7 °C | 40.39 mm |
| March | -3.9 °C | 10.4 °C | 40.13 mm |
| April | -0.8 °C | 14.5 °C | 31.5 mm |
| May | 3.3 °C | 19.9 °C | 33.02 mm |
| June | 8.1 °C | 26.3 °C | 13.97 mm |
| July | 11.5 °C | 29.1 °C | 30.73 mm |
| August | 11.2 °C | 27.7 °C | 43.43 mm |
| September | 7 °C | 23.4 °C | 48.26 mm |
| October | 1.2 °C | 16.7 °C | 41.15 mm |
| November | -4.3 °C | 10 °C | 35.05 mm |
| December | -8.7 °C | 4.2 °C | 37.34 mm |
| Annual | 0.7 °C | 16 °C | 437.9 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |