Parker, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 36.2 °F (low) to 64.2 °F (high). Annual precipitation averages 17.6 Inches. Parker 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 | 18.2 °F | 45.2 °F | 0.58 in. |
| February | 19.4 °F | 46.0 °F | 0.58 in. |
| March | 26.8 °F | 54.5 °F | 1.39 in. |
| April | 33.0 °F | 60.4 °F | 2.24 in. |
| May | 42.3 °F | 69.2 °F | 2.34 in. |
| June | 51.9 °F | 81.2 °F | 2.38 in. |
| July | 58.1 °F | 87.4 °F | 2.25 in. |
| August | 56.3 °F | 85.0 °F | 2.03 in. |
| September | 48.0 °F | 77.9 °F | 1.28 in. |
| October | 35.7 °F | 65.1 °F | 1.19 in. |
| November | 26.2 °F | 53.6 °F | 0.75 in. |
| December | 18.2 °F | 44.6 °F | 0.6 in. |
| Annual | 36.2 °F | 64.2 °F | 17.61 in. |
| 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 : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |