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Weather & Climate in Ajo, AZ
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ajo has a warm climate with an average annual temperature of 74°F (23°C). Winters average 56°F in January while summers reach 92°F in July. The area gets 330 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 7.0 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 45. The city sits at an elevation of 1,713 feet.
Temperature
56°F Jan (13°C)
92°F Jul (33°C)
| Annual Average | 73.5°F |
| 36% above US avg | |
| January Average | 56°F (13°C) |
| July Average | 92°F (33°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 1,713 ft (522 m) |
| Area | 33.3 sq mi (86.3 km²) |
| Population Density | 114/sq mi |
| Coordinates | 32.3923°N, 112.8839°W |
| Timezone | America/Phoenix |
| County | Yuma County County |
| Nearest Airport | Phoenix Sky Harbor International (PHX) 88 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 45.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 92.6 / 100 |
| Social Vulnerability | 68.5 / 100 |
| Community Resilience | 1.2 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Very Low |
| Earthquake | Relatively High |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively High |
| Winter Weather | Very Low |
| Lightning | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | No Rating |
| Landslide | Very Low |
| Volcano | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
11 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.0.
| Jul 4, 1994 | 37 km N of Puerto Peñasco, Mexico | M4.0 | 99 km | 10 km |
| Aug 8, 2000 | 39 km S of Dateland, Arizona | M3.5 | 56 km | 5 km |
| Jan 17, 2001 | 69km ESE of Fortuna Foothills, AZ | M3.2 | 79 km | 6 km |
| Mar 31, 1996 | 147km ESE of Fortuna Foothills, Arizona | M3.0 | 42 km | 6 km |
| Feb 20, 2010 | 122km ESE of Estacion Coahuila, B.C., MX | M2.9 | 131 km | 6 km |
| Apr 15, 1993 | 154km SE of Estacion Coahuila, B.C., MX | M2.8 | 149 km | 6 km |
| Jan 11, 2000 | 92km ESE of Estacion Coahuila, B.C., MX | M2.7 | 135 km | 6 km |
| Jul 6, 2025 | 44 km E of Golfo de Santa Clara, Mexico | M2.7 | 135 km | 10 km |
| Aug 17, 1993 | 154km SE of Estacion Coahuila, B.C., MX | M2.7 | 140 km | 6 km |
| Jun 8, 2003 | 64km SE of San Luis Rio Colorado, Son., MX | M2.7 | 145 km | 6 km |
| Jul 1, 1992 | 115km SE of Estacion Coahuila, B.C., MX | M2.7 | 138 km | 6 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
12 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 7 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Aug 4, 1957 | EF3 | 59 km | 12.0 mi | 0 |
| Sep 5, 1981 | EF1 | 92 km | 2.0 mi | 0 |
| Sep 5, 1981 | EF1 | 64 km | 1.0 mi | 0 |
| Jun 21, 1972 | EF1 | 100 km | 6.4 mi | 0 |
| Aug 1, 1969 | EF1 | 68 km | 0.1 mi | 0 |
| Jul 22, 1961 | EF1 | 84 km | 0.1 mi | 0 |
| Jul 25, 1956 | EF1 | 89 km | 0.1 mi | 0 |
| Apr 4, 2004 | EF0 | 93 km | 0.1 mi | 0 |
| Jul 14, 1995 | EF0 | 64 km | 0.1 mi | 0 |
| Aug 12, 1982 | EF0 | 63 km | 0.5 mi | 0 |
| Oct 4, 1972 | EF0 | 85 km | 0.1 mi | 0 |
| Aug 29, 1957 | EF0 | 61 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
1 volcano within 200 km. Closest: Pinacate (90 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Pinacate | Pyroclastic cone(s) | 1,200 m (3,937 ft) | Unknown | 90 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: GOLDWATER (56,690 acres, 2005).
| Year | Name | Acres Burned | Distance |
| 2005 | GOLDWATER | 56,690 | 30 km |
| 2005 | GROWLER PEAK | 28,182 | 31 km |
| 2005 | SAND TANK COMPLEX (SAND TANK) | 11,601 | 49 km |
| 2005 | UNNAMED | 9,537 | 52 km |
| 2005 | UNNAMED | 8,179 | 40 km |
| 2005 | UNNAMED | 7,638 | 33 km |
| 2005 | VEKOL | 7,349 | 84 km |
| 2005 | THEBA | 6,351 | 55 km |
| 2004 | CITRUS | 5,915 | 70 km |
| 2005 | TRACKS | 5,641 | 82 km |
| 2005 | CRATER | 3,136 | 30 km |
| 2005 | GUACAMOLE | 2,401 | 78 km |
| 2005 | 2000 | 2,269 | 54 km |
| 2021 | GILA | 2,171 | 78 km |
| 2005 | TOP | 1,496 | 73 km |
| 2005 | SAND TANK COMPLEX (HOME) | 1,470 | 43 km |
| 2005 | GETTING | 1,403 | 98 km |
| 2006 | SADDLE | 1,170 | 69 km |
| 2023 | GOLDWATER | 1,162 | 52 km |
| 2005 | CAMINO | 1,144 | 71 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 56°F (13°C) | 0.7 in | |
| February | 58°F (15°C) | 0.6 in | |
| March | 62°F (17°C) | 0.6 in | |
| April | 69°F (21°C) | 0.2 in | |
| May | 77°F (25°C) | 0.1 in | |
| June | 87°F (30°C) | 0.0 in | Driest |
| July | 92°F (33°C) | 0.9 in | Warmest |
| August | 90°F (32°C) | 1.3 in | Wettest |
| September | 85°F (29°C) | 0.9 in | |
| October | 75°F (24°C) | 0.7 in | |
| November | 62°F (16°C) | 0.6 in | |
| December | 55°F (13°C) | 1.0 in | Coldest |
Ajo has a seasonal temperature swing of 37°F / from 55°F in December to 92°F in July. Total annual precipitation is 7.6 inches, with August being the wettest month (1.3") and June the driest (0.0").