Rockville, Utah has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 8 °C (low) to 24.2 °C (high). Annual precipitation averages 339.6 Millimeters. 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 | -1.8 °C | 11.5 °C | 34.29 mm |
| February | 0.1 °C | 13.6 °C | 48.01 mm |
| March | 3.2 °C | 18.1 °C | 42.93 mm |
| April | 6 °C | 22.9 °C | 25.15 mm |
| May | 10.6 °C | 28.7 °C | 15.75 mm |
| June | 15.8 °C | 35 °C | 5.08 mm |
| July | 20.1 °C | 37.9 °C | 21.59 mm |
| August | 19.3 °C | 36.7 °C | 30.23 mm |
| September | 15.2 °C | 32.7 °C | 25.15 mm |
| October | 8.3 °C | 25.6 °C | 27.43 mm |
| November | 1.9 °C | 17.1 °C | 22.86 mm |
| December | -2.2 °C | 10.9 °C | 41.15 mm |
| Annual | 8 °C | 24.2 °C | 339.62 mm |
| 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 : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |