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Weather & Climate in Wellton Hills, AZ
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Wellton Hills has a warm climate with an average annual temperature of 73°F (23°C). Winters average 56°F in January while summers reach 93°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 4.0 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 362 feet.
Temperature
56°F Jan (13°C)
93°F Jul (34°C)
| Annual Average | 73.2°F |
| 36% above US avg | |
| January Average | 56°F (13°C) |
| July Average | 93°F (34°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 362 ft (110 m) |
| Area | 0.6 sq mi (1.7 km²) |
| Population Density | 389/sq mi |
| Coordinates | 32.6232°N, 114.1452°W |
| Timezone | America/Phoenix |
| County | Yuma County County |
| Nearest Airport | Yuma Mcas/Yuma International (YUM) 27 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
6,502 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.2.
| Apr 4, 2010 | The 2010 Sierra El Mayor, B.C., Mexico Earthquake | M7.2 | 114 km | 10 km |
| Dec 30, 2009 | 12km N of Delta, B.C., MX | M5.8 | 99 km | 6 km |
| Apr 4, 2010 | 12km SSW of Estacion Coahuila, B.C., MX | M5.7 | 103 km | 10 km |
| Feb 22, 2002 | 13km WSW of Delta, B.C., MX | M5.7 | 115 km | 7 km |
| Dec 8, 2001 | 22km S of Estacion Coahuila, B.C., MX | M5.7 | 106 km | 7 km |
| Mar 7, 2020 | 71km SE of Estacion Coahuila, B.C., MX | M5.5 | 110 km | 10 km |
| Apr 4, 2010 | 9km SW of Delta, B.C., MX | M5.4 | 111 km | 10 km |
| Aug 26, 2012 | 4km NNW of Brawley, CA | M5.4 | 138 km | 8 km |
| Apr 4, 2010 | 12km WNW of Alberto Oviedo Mota, B.C., MX | M5.4 | 115 km | 10 km |
| May 24, 2006 | 6km SSW of Delta, B.C., MX | M5.4 | 108 km | 6 km |
| Aug 26, 2012 | 5km NNW of Brawley, CA | M5.3 | 139 km | 8 km |
| Apr 8, 2010 | 12km SW of Alberto Oviedo Mota, B.C., MX | M5.3 | 117 km | 10 km |
| Apr 4, 2010 | 15km SSW of Progreso, B.C., MX | M5.3 | 141 km | 10 km |
| Apr 5, 2010 | 27km SSW of Estacion Coahuila, B.C., MX | M5.2 | 117 km | 10 km |
| Oct 3, 1994 | 5 km NE of Ejido Doctor Alberto Oviedo Mota (El Indiviso), Mexico | M5.2 | 98 km | 10 km |
| Feb 9, 2008 | 8km W of Delta, B.C., MX | M5.1 | 110 km | 6 km |
| Feb 11, 2008 | 7km WSW of Delta, B.C., MX | M5.1 | 109 km | 6 km |
| Feb 18, 2011 | 17km SSW of Estacion Coahuila, B.C., MX | M5.1 | 107 km | 15 km |
| Sep 19, 2009 | 7km WNW of Delta, B.C., MX | M5.1 | 108 km | 10 km |
| Feb 19, 2008 | 14km NW of Delta, B.C., MX | M5.0 | 112 km | 6 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
15 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 injury.
| Date | Rating | Distance | Path | Fatalities |
| Aug 4, 1957 | EF3 | 92 km | 12.0 mi | 0 |
| Aug 17, 1959 | EF2 | 5 km | 0.1 mi | 0 |
| Sep 22, 1987 | EF1 | 40 km | 0.5 mi | 0 |
| Sep 13, 1966 | EF1 | 51 km | 0.1 mi | 0 |
| Jul 5, 1965 | EF1 | 47 km | 2.0 mi | 0 |
| Oct 13, 2018 | EF0 | 33 km | 0.1 mi | 0 |
| Aug 10, 2006 | EF0 | 34 km | 10.0 mi | 0 |
| Aug 30, 2000 | EF0 | 96 km | 3.0 mi | 0 |
| Sep 22, 1987 | EF0 | 39 km | 0.5 mi | 0 |
| Sep 28, 1979 | EF0 | 37 km | 0.1 mi | 0 |
| Feb 10, 1978 | EF0 | 7 km | 0.1 mi | 0 |
| Feb 10, 1978 | EF0 | 22 km | 0.1 mi | 0 |
| Oct 4, 1972 | EF0 | 88 km | 0.1 mi | 0 |
| Jul 5, 1965 | EF0 | 67 km | 0.1 mi | 0 |
| Aug 29, 1957 | EF0 | 93 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Pinacate (113 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Pinacate | Pyroclastic cone(s) | 1,200 m (3,937 ft) | Unknown | 113 km |
| Salton Buttes | Lava dome(s) | -40 m (-131 ft) | 210 | 151 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: KING VALLEY (32,964 acres, 2005).
| Year | Name | Acres Burned | Distance |
| 2005 | KING VALLEY | 32,964 | 52 km |
| 2005 | GROWLER PEAK | 28,182 | 91 km |
| 2005 | UNNAMED | 8,179 | 91 km |
| 2005 | UNNAMED | 7,638 | 100 km |
| 2006 | CIBOLA | 4,703 | 94 km |
| 2011 | THREE SLASHES | 4,581 | 89 km |
| 2005 | CRATER | 3,136 | 99 km |
| 1989 | LAGUNA II | 3,042 | 40 km |
| 1989 | FERGUSON | 2,284 | 54 km |
| 2005 | 2000 | 2,269 | 88 km |
| 2021 | GILA | 2,171 | 75 km |
| 1992 | WALTERS | 2,170 | 88 km |
| 2013 | ISLAND LAKE | 2,021 | 68 km |
| 1987 | FERGUSONLK | 1,692 | 54 km |
| 2005 | GETTING | 1,403 | 29 km |
| 2021 | CLIP | 1,295 | 75 km |
| 2019 | BERMUDA | 1,175 | 39 km |
| 2005 | CAMINO | 1,144 | 63 km |
| 2003 | MITTRY | 1,066 | 39 km |
| 1987 | IMPERIAL | 1,006 | 50 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 56°F (13°C) | 0.5 in | |
| February | 59°F (15°C) | 0.4 in | |
| March | 64°F (18°C) | 0.4 in | |
| April | 70°F (21°C) | 0.1 in | |
| May | 78°F (26°C) | 0.0 in | Driest |
| June | 87°F (30°C) | 0.0 in | |
| July | 93°F (34°C) | 0.4 in | Warmest |
| August | 92°F (33°C) | 0.6 in | |
| September | 86°F (30°C) | 0.7 in | Wettest |
| October | 75°F (24°C) | 0.4 in | |
| November | 62°F (17°C) | 0.3 in | |
| December | 54°F (12°C) | 0.5 in | Coldest |
Wellton Hills has a seasonal temperature swing of 39°F / from 54°F in December to 93°F in July. Total annual precipitation is 4.2 inches, with September being the wettest month (0.7") and May the driest (0.0").