Redlands, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 3.8 °C (low) to 19.2 °C (high). Annual precipitation averages 246.9 Millimeters. Redlands is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.2 °C | 3.8 °C | 12.95 mm |
| February | -4.7 °C | 8.2 °C | 14.48 mm |
| March | -0.8 °C | 14.6 °C | 19.05 mm |
| April | 2.8 °C | 18.6 °C | 27.69 mm |
| May | 8 °C | 24.3 °C | 23.11 mm |
| June | 12.8 °C | 31.2 °C | 15.24 mm |
| July | 16.6 °C | 34.1 °C | 22.35 mm |
| August | 15.5 °C | 32.4 °C | 24.13 mm |
| September | 10.3 °C | 27.7 °C | 27.18 mm |
| October | 3.6 °C | 19.8 °C | 31.5 mm |
| November | -2.7 °C | 11.5 °C | 14.48 mm |
| December | -7.7 °C | 4.2 °C | 14.73 mm |
| Annual | 3.8 °C | 19.2 °C | 246.89 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |