All Countries
Weather & Climate in Round Rock, AZ
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Round Rock enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 34°F in January while summers reach 81°F in July. The area gets 318 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Air quality is rated Good with a median AQI of 45. The city sits at an elevation of 5,409 feet.
Temperature
34°F Jan (1°C)
81°F Jul (27°C)
| Annual Average | 57.2°F |
| 6% above US avg | |
| January Average | 34°F (1°C) |
| July Average | 81°F (27°C) |
| Sunny Days | 318 days/yr |
Geography
| Elevation | 5,409 ft (1,649 m) |
| Area | 14.3 sq mi (36.9 km²) |
| Population Density | 38/sq mi |
| Coordinates | 36.5043°N, 109.4632°W |
| Timezone | America/Phoenix |
| County | San Juan County County |
| Nearest Airport | Four Corners Regional (FMN) 70 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 45.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 88.3 / 100 |
| Social Vulnerability | 91.5 / 100 |
| Community Resilience | 5.3 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively Low |
| Drought | Relatively High |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Moderate |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
20 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.7.
| Apr 22, 2017 | 4 km SSW of Bluff, Utah | M3.7 | 83 km | 9 km |
| Jun 6, 2008 | 10 km NE of Bluff, Utah | M3.6 | 95 km | 12 km |
| Jun 25, 1991 | 10 km W of Oljato-Monument Valley, Utah | M3.4 | 99 km | 0 km |
| Jul 13, 2009 | 3 km SE of Navajo Mountain, Utah | M3.3 | 128 km | 3 km |
| Feb 24, 1993 | 16 km SSE of Monticello, Utah | M3.1 | 137 km | -1 km |
| May 13, 1993 | 19 km SSE of Monticello, Utah | M3.1 | 134 km | -3 km |
| Jul 4, 2021 | 24 km SW of Lake Valley, New Mexico | M3.1 | 115 km | 5 km |
| Jul 15, 1992 | 26 km NNW of Mexican Hat, Utah | M3.0 | 107 km | 5 km |
| May 20, 1994 | 0 km SSE of Oljato-Monument Valley, Utah | M3.0 | 91 km | -1 km |
| Sep 13, 1996 | 10 km NW of Kayenta, Arizona | M2.9 | 85 km | 2 km |
| Sep 22, 1992 | 15 km NW of Oljato-Monument Valley, Utah | M2.8 | 107 km | 0 km |
| Jun 10, 2020 | 5 km WNW of Tsaile, Arizona | M2.8 | 26 km | 14 km |
| Mar 8, 1994 | 15 km NW of Kayenta, Arizona | M2.8 | 90 km | -3 km |
| Nov 30, 2012 | 12 km ESE of Halls Crossing, Utah | M2.7 | 142 km | 17 km |
| May 20, 1994 | 8 km NNW of Kayenta, Arizona | M2.7 | 82 km | -2 km |
| Sep 23, 1995 | 4 km E of Teec Nos Pos, Arizona | M2.7 | 60 km | 8 km |
| Aug 26, 2024 | 8 km S of Rough Rock, Arizona | M2.6 | 42 km | 5 km |
| Mar 6, 2023 | 17 km ENE of Chilchinbito, Arizona | M2.6 | 39 km | 13 km |
| Aug 25, 2024 | 13 km NNE of Round Rock, Arizona | M2.5 | 14 km | 5 km |
| Jul 16, 2022 | 11 km NW of Many Farms, Arizona | M2.5 | 23 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
8 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF0.
| Date | Rating | Distance | Path | Fatalities |
| Sep 13, 2022 | EF0 | 51 km | 7.7 mi | 0 |
| Oct 20, 2015 | EF0 | 99 km | 6.9 mi | 0 |
| Jun 6, 2015 | EF0 | 67 km | 28.7 mi | 0 |
| Sep 10, 2013 | EF0 | 78 km | 0.2 mi | 0 |
| Oct 21, 2010 | EF0 | 53 km | 0.8 mi | 0 |
| Aug 3, 2010 | EF0 | 31 km | 1.0 mi | 0 |
| May 25, 1996 | EF0 | 75 km | 0.1 mi | 0 |
| Apr 29, 1957 | EF0 | 51 km | 2.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
18 wildfires (100+ acres) recorded within 100 km. Largest: WOOD SPRINGS 2 (13,208 acres, 2020).
| Year | Name | Acres Burned | Distance |
| 2020 | WOOD SPRINGS 2 | 13,208 | 69 km |
| 2014 | ASSAYII LAKE | 13,176 | 76 km |
| 1986 | WESTTOE | 5,397 | 81 km |
| 1986 | HOGAN | 5,298 | 92 km |
| 2005 | LITTLE WATER1 | 4,342 | 82 km |
| 2002 | CARRIZO 1 | 3,701 | 46 km |
| 2005 | HOOK LAKE | 3,609 | 59 km |
| 1984 | FERNANDO | 3,419 | 90 km |
| 2009 | SAWMILL ROAD RX | 3,411 | 77 km |
| 2004 | TURKEY SPRING | 3,017 | 50 km |
| 2004 | SANDSPRING | 2,935 | 75 km |
| 1987 | AZTECTHREE | 2,857 | 83 km |
| 2010 | FLUTED ROCK LAKE RX | 2,630 | 69 km |
| 2006 | KINLICHEE CANYON 1 | 2,283 | 88 km |
| 2005 | KINLICHEE | 1,949 | 90 km |
| 2011 | CATTAIL CANYON JACKPOT BURN | 1,801 | 60 km |
| 2006 | KINLICHEE 2 | 1,738 | 89 km |
| 2001 | 9400 FMZ | 1,312 | 67 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 34°F (1°C) | 0.8 in | |
| February | 36°F (2°C) | 0.6 in | |
| March | 43°F (6°C) | 0.8 in | |
| April | 50°F (10°C) | 0.5 in | |
| May | 59°F (15°C) | 0.4 in | |
| June | 70°F (21°C) | 0.3 in | Driest |
| July | 81°F (27°C) | 1.0 in | Warmest |
| August | 75°F (24°C) | 1.2 in | Wettest |
| September | 67°F (20°C) | 0.9 in | |
| October | 55°F (13°C) | 1.1 in | |
| November | 42°F (6°C) | 0.8 in | |
| December | 32°F (0°C) | 0.8 in | Coldest |
Round Rock has a seasonal temperature swing of 49°F / from 32°F in December to 81°F in July. Total annual precipitation is 9.2 inches, with August being the wettest month (1.2") and June the driest (0.3").