Roxborough Park, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 2.1 °C (low) to 18.1 °C (high). Annual precipitation averages 489.5 Millimeters. Roxborough Park is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.9 °C | 7.9 °C | 18.8 mm |
| February | -7.3 °C | 8.4 °C | 21.08 mm |
| March | -3.1 °C | 12.9 °C | 47.75 mm |
| April | 0.4 °C | 16 °C | 68.07 mm |
| May | 5.6 °C | 20.8 °C | 63.25 mm |
| June | 10.8 °C | 27.3 °C | 41.15 mm |
| July | 14.3 °C | 30.6 °C | 47.75 mm |
| August | 13.3 °C | 29.4 °C | 52.58 mm |
| September | 8.6 °C | 25.4 °C | 42.93 mm |
| October | 1.7 °C | 18.4 °C | 38.86 mm |
| November | -3.6 °C | 12.3 °C | 24.64 mm |
| December | -8.1 °C | 7.4 °C | 22.61 mm |
| Annual | 2.1 °C | 18.1 °C | 489.47 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |