Weather & Climate in Wellton, AZ

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Wellton 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 325 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	325 ft (99 m)
Area	28.9 sq mi (74.8 km²)
Population Density	85/sq mi
Coordinates	32.6401°N, 114.2152°W
Timezone	America/Phoenix
County	Yuma County County
Nearest Airport	Yuma Mcas/Yuma International (YUM) 23 miles away

Precipitation & Snow

Annual Rainfall 4.0"

89% below US avg

Wettest Month (Aug) 0.67"

Driest Month (May) 0.04"

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

7,466 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	109 km	10 km
Dec 30, 2009	12km N of Delta, B.C., MX	M5.8	93 km	6 km
Apr 4, 2010	12km SSW of Estacion Coahuila, B.C., MX	M5.7	99 km	10 km
Feb 22, 2002	13km WSW of Delta, B.C., MX	M5.7	110 km	7 km
Dec 8, 2001	22km S of Estacion Coahuila, B.C., MX	M5.7	103 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	105 km	10 km
Aug 26, 2012	4km NNW of Brawley, CA	M5.4	131 km	8 km
Apr 4, 2010	12km WNW of Alberto Oviedo Mota, B.C., MX	M5.4	109 km	10 km
May 24, 2006	6km SSW of Delta, B.C., MX	M5.4	102 km	6 km
Aug 26, 2012	5km NNW of Brawley, CA	M5.3	132 km	8 km
Apr 8, 2010	12km SW of Alberto Oviedo Mota, B.C., MX	M5.3	112 km	10 km
Apr 4, 2010	15km SSW of Progreso, B.C., MX	M5.3	134 km	10 km
Jun 5, 2021	11km W of Calipatria, CA	M5.3	144 km	6 km
Apr 5, 2010	27km SSW of Estacion Coahuila, B.C., MX	M5.2	113 km	10 km
Oct 3, 1994	5 km NE of Ejido Doctor Alberto Oviedo Mota (El Indiviso), Mexico	M5.2	94 km	10 km
Feb 9, 2008	8km W of Delta, B.C., MX	M5.1	104 km	6 km
Feb 11, 2008	7km WSW of Delta, B.C., MX	M5.1	104 km	6 km
Feb 18, 2011	17km SSW of Estacion Coahuila, B.C., MX	M5.1	103 km	15 km
Sep 19, 2009	7km WNW of Delta, B.C., MX	M5.1	103 km	10 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	98 km	12.0 mi	0
Aug 17, 1959	EF2	12 km	0.1 mi	0
Sep 22, 1987	EF1	34 km	0.5 mi	0
Sep 13, 1966	EF1	44 km	0.1 mi	0
Jul 5, 1965	EF1	40 km	2.0 mi	0
Oct 13, 2018	EF0	28 km	0.1 mi	0
Aug 10, 2006	EF0	31 km	10.0 mi	0
Aug 30, 2000	EF0	89 km	3.0 mi	0
Sep 22, 1987	EF0	33 km	0.5 mi	0
Sep 28, 1979	EF0	33 km	0.1 mi	0
Feb 10, 1978	EF0	6 km	0.1 mi	0
Feb 10, 1978	EF0	28 km	0.1 mi	0
Oct 4, 1972	EF0	93 km	0.1 mi	0
Jul 5, 1965	EF0	60 km	0.1 mi	0
Aug 29, 1957	EF0	98 km	0.1 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Nearby Volcanoes

2 volcanoes within 200 km. Closest: Pinacate (118 km).

Name	Type	Elevation	Last Eruption	Distance
Pinacate	Pyroclastic cone(s)	1,200 m (3,937 ft)	Unknown	118 km
Salton Buttes	Lava dome(s)	-40 m (-131 ft)	210	145 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

18 wildfires (100+ acres) recorded within 100 km. Largest: KING VALLEY (32,964 acres, 2005).

Year	Name	Acres Burned	Distance
2005	KING VALLEY	32,964	54 km
2005	GROWLER PEAK	28,182	97 km
2005	UNNAMED	8,179	98 km
2006	CIBOLA	4,703	89 km
2011	THREE SLASHES	4,581	84 km
1989	LAGUNA II	3,042	34 km
1989	FERGUSON	2,284	49 km
2005	2000	2,269	94 km
2021	GILA	2,171	80 km
1992	WALTERS	2,170	83 km
2013	ISLAND LAKE	2,021	62 km
1987	FERGUSONLK	1,692	48 km
2005	GETTING	1,403	35 km
2021	CLIP	1,295	70 km
2019	BERMUDA	1,175	33 km
2005	CAMINO	1,144	69 km
2003	MITTRY	1,066	33 km
1987	IMPERIAL	1,006	44 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	63°F (17°C)	0.3 in
April	70°F (21°C)	0.1 in
May	78°F (25°C)	0.0 in	Driest
June	86°F (30°C)	0.0 in
July	93°F (34°C)	0.4 in	Warmest
August	91°F (33°C)	0.7 in	Wettest
September	86°F (30°C)	0.6 in
October	75°F (24°C)	0.4 in
November	63°F (17°C)	0.3 in
December	55°F (13°C)	0.5 in	Coldest

Wellton has a seasonal temperature swing of 38°F / from 55°F in December to 93°F in July. Total annual precipitation is 4.3 inches, with August being the wettest month (0.7") and May the driest (0.0").

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