Weather & Climate in Rockville, UT
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Rockville enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 42°F in January while summers reach 85°F in July. Annual precipitation totals 16.3 inches (drier than the 38-inch national average). The area receives 4.0 inches of snow annually. Air quality is rated Good with a median AQI of 44. 76% of days have good air quality. The city sits at an elevation of 3,915 feet.
Temperature
42°F Jan (6°C)
85°F Jul (29°C)
| Annual Average | 62.0°F |
| 15% above US avg | |
| January Average | 42°F (6°C) |
| July Average | 85°F (29°C) |
Geography
| Elevation | 3,915 ft (1,193 m) |
| Area | 8.2 sq mi (21.3 km²) |
| Population Density | 20/sq mi |
| Coordinates | 37.1478°N, 113.0548°W |
| Timezone | America/Denver |
| County | Washington County County |
| Nearest Airport | St George Regional (SGU) 26 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 44.0 |
| Rating | Good |
| Good Days % | 76.0% |
| Unhealthy Days | 2 |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 92.8 / 100 |
| Social Vulnerability | 20.8 / 100 |
| Community Resilience | 45.1 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively High |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Low |
| Lightning | Very High |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Very Low |
| Landslide | Relatively High |
| Volcano | Very Low |
| Avalanche | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
642 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.9.
| Sep 2, 1992 | 3 km SSE of Washington, Utah | M5.9 | 40 km | 14 km |
| May 22, 2015 | 37 km SSW of Caliente, Nevada | M5.3 | 143 km | 4 km |
| Apr 20, 1991 | 19 km SE of Minersville, Utah | M4.6 | 106 km | 10 km |
| Jan 3, 2011 | 10 km NW of Circleville, Utah | M4.6 | 137 km | 11 km |
| Jul 29, 2024 | 24 km S of Brian Head, Utah | M4.5 | 40 km | 20 km |
| Jan 2, 1998 | 10 km ESE of Beaver, Utah | M4.4 | 130 km | 12 km |
| Sep 19, 2022 | 45 km ESE of Littlefield, Arizona | M4.4 | 66 km | 10 km |
| Jun 20, 2006 | 45 km SSW of Caliente, Nevada | M4.4 | 144 km | 0 km |
| Jun 30, 2008 | 36 km SSE of Caliente, Nevada | M4.3 | 113 km | 0 km |
| Jan 15, 2016 | 19 km WSW of Enterprise, Utah | M4.2 | 87 km | 1 km |
| Jun 30, 2019 | 6 km E of Panaca, Nevada | M4.2 | 132 km | 3 km |
| Jun 29, 1992 | 12 km WNW of Cedar City, Utah | M4.2 | 66 km | -3 km |
| Apr 12, 2012 | 16 km NNE of Bryce Canyon City, Utah | M4.2 | 112 km | 15 km |
| Jun 29, 1992 | 12 km WNW of Cedar City, Utah | M4.2 | 63 km | 7 km |
| Jan 28, 2014 | 37 km W of Veyo, Utah | M4.1 | 96 km | 7 km |
| Jan 4, 2010 | 8 km S of Cedar City, Utah | M4.1 | 50 km | 9 km |
| Oct 22, 1999 | 20 km SE of Minersville, Utah | M4.1 | 109 km | 6 km |
| Nov 8, 2009 | 32 km S of Caliente, Nevada | M4.1 | 126 km | 0 km |
| Jul 4, 2015 | Utah | M4.1 | 94 km | 3 km |
| Sep 6, 1994 | 12 km SSW of Circleville, Utah | M4.0 | 121 km | 6 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
11 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1.
| Date | Rating | Distance | Path | Fatalities |
| Sep 22, 2016 | EF1 | 94 km | 0.8 mi | 0 |
| May 30, 1986 | EF1 | 78 km | 3.5 mi | 0 |
| Dec 27, 1983 | EF1 | 21 km | 0.4 mi | 0 |
| Aug 12, 1976 | EF1 | 23 km | 0.1 mi | 0 |
| Aug 26, 2016 | EF0 | 92 km | 0.3 mi | 0 |
| Aug 24, 2011 | EF0 | 13 km | 1.1 mi | 0 |
| Sep 8, 2000 | EF0 | 93 km | 2.0 mi | 0 |
| Jul 23, 1998 | EF0 | 65 km | 0.1 mi | 0 |
| Apr 26, 1994 | EF0 | 58 km | 3.0 mi | 0 |
| Aug 31, 1992 | EF0 | 40 km | 0.3 mi | 0 |
| Jul 14, 1953 | EF0 | 43 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Markagunt Plateau (59 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Markagunt Plateau | Volcanic field | 2,840 m (9,318 ft) | 1050 | 59 km |
| Uinkaret Field | Volcanic field | 1,555 m (5,102 ft) | 1100 | 86 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: BRIANHEAD (74,276 acres, 2017).
| Year | Name | Acres Burned | Distance |
| 2017 | BRIANHEAD | 74,276 | 78 km |
| 2020 | MANGUM | 71,634 | 87 km |
| 2005 | WESTSIDE COMPLEX | 58,767 | 76 km |
| 2006 | WARM | 58,255 | 98 km |
| 2006 | JARVIS | 49,636 | 67 km |
| 2005 | COW | 44,460 | 94 km |
| 2020 | BASIN | 38,588 | 97 km |
| 2005 | TWEEDY POINT | 36,126 | 86 km |
| 1996 | BRIDGER KNOLL | 35,478 | 89 km |
| 2012 | HOBBLE COMPLEX | 35,205 | 80 km |
| 2004 | HAWKINS | 34,259 | 81 km |
| 2003 | APEX | 31,000 | 68 km |
| 2005 | MT BANGS COMPLEX | 29,605 | 94 km |
| 2006 | BULL COMPLEX | 27,458 | 85 km |
| 2007 | BLACK ROCK GULCH | 21,639 | 72 km |
| 1999 | JUMPSPRING | 19,621 | 83 km |
| 1996 | JUMP | 19,411 | 75 km |
| 2019 | CASTLE | 19,271 | 97 km |
| 2006 | COVE MOUNTAIN | 17,746 | 69 km |
| 2004 | SQUARE COMPLEX | 17,413 | 76 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (6°C) | 2.0 in | |
| February | 46°F (8°C) | 2.1 in | Wettest |
| March | 52°F (11°C) | 2.0 in | |
| April | 58°F (15°C) | 1.2 in | |
| May | 68°F (20°C) | 0.8 in | |
| June | 79°F (26°C) | 0.2 in | Driest |
| July | 85°F (29°C) | 1.2 in | Warmest |
| August | 83°F (29°C) | 1.6 in | |
| September | 76°F (24°C) | 1.2 in | |
| October | 63°F (17°C) | 1.2 in | |
| November | 51°F (10°C) | 1.2 in | |
| December | 41°F (5°C) | 1.6 in | Coldest |
Rockville has a seasonal temperature swing of 44°F / from 41°F in December to 85°F in July. Total annual precipitation is 16.3 inches, with February being the wettest month (2.1") and June the driest (0.2").