Granada, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 3 °C (low) to 20.2 °C (high). Annual precipitation averages 424.7 Millimeters. Granada 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 | -9.6 °C | 7.4 °C | 8.38 mm |
| February | -7.8 °C | 9.6 °C | 9.14 mm |
| March | -3.3 °C | 15.2 °C | 21.34 mm |
| April | 1.6 °C | 19.6 °C | 36.83 mm |
| May | 7.8 °C | 24.8 °C | 54.1 mm |
| June | 14.1 °C | 30.8 °C | 63.25 mm |
| July | 17.1 °C | 33.1 °C | 73.41 mm |
| August | 16.1 °C | 31.7 °C | 74.68 mm |
| September | 10.7 °C | 28 °C | 27.94 mm |
| October | 2.4 °C | 21.1 °C | 33.02 mm |
| November | -4.4 °C | 13.5 °C | 11.94 mm |
| December | -9.1 °C | 7.7 °C | 10.67 mm |
| Annual | 3 °C | 20.2 °C | 424.7 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 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 | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |