Rockvale, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 37.3 °F (low) to 66.6 °F (high). Annual precipitation averages 14 Inches. Rockvale 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.8 °F | 47.5 °F | 0.68 in. |
| February | 20.5 °F | 48.5 °F | 0.47 in. |
| March | 27.3 °F | 57.2 °F | 1.15 in. |
| April | 34.0 °F | 64.0 °F | 1.84 in. |
| May | 43.6 °F | 72.8 °F | 1.97 in. |
| June | 53.0 °F | 84.1 °F | 0.97 in. |
| July | 58.8 °F | 88.6 °F | 2.11 in. |
| August | 57.1 °F | 85.9 °F | 1.79 in. |
| September | 48.8 °F | 79.7 °F | 1.19 in. |
| October | 36.6 °F | 68.1 °F | 0.82 in. |
| November | 27.6 °F | 55.9 °F | 0.61 in. |
| December | 20.2 °F | 47.3 °F | 0.38 in. |
| Annual | 37.3 °F | 66.6 °F | 13.98 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |