Rockville, Utah has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 46.5 °F (low) to 75.6 °F (high). Annual precipitation averages 13.4 Inches. Rockville is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.8 °F | 52.7 °F | 1.35 in. |
| February | 32.2 °F | 56.5 °F | 1.89 in. |
| March | 37.8 °F | 64.6 °F | 1.69 in. |
| April | 42.8 °F | 73.3 °F | 0.99 in. |
| May | 51.1 °F | 83.6 °F | 0.62 in. |
| June | 60.5 °F | 95.0 °F | 0.2 in. |
| July | 68.2 °F | 100.3 °F | 0.85 in. |
| August | 66.7 °F | 98.1 °F | 1.19 in. |
| September | 59.3 °F | 90.8 °F | 0.99 in. |
| October | 47.0 °F | 78.1 °F | 1.08 in. |
| November | 35.4 °F | 62.7 °F | 0.9 in. |
| December | 28.1 °F | 51.6 °F | 1.62 in. |
| Annual | 46.5 °F | 75.6 °F | 13.37 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |