Unión Hidalgo, Mexico

Full City Profile

13,683 Population 274/sq mi density

49 ft Elevation 15 meters

81°F Avg Temperature 27°C

Unión Hidalgo has a warm climate with an average annual temperature of 81°F (27°C). Winters average 77°F in January while summers reach 83°F in July. The area gets 267 sunny days per year. Annual precipitation totals 38.2 inches. The area receives 0.0 inches of snow annually.

Temperature

77°F Jan (25°C) 83°F Jul (28°C)

Annual Average	81.1°F
	50% above US avg
January Average	77°F (25°C)
July Average	83°F (28°C)
Sunny Days	267 days/yr

Geography

Elevation	49 ft (15 m)
Area	50.0 sq mi (129.6 km²)
Population Density	274/sq mi
Coordinates	16.4723°N, 94.8295°W
Timezone	America/Mexico_City

Precipitation & Snow

Annual Rainfall 38.2"

0% below US avg

Snowfall 0.0"

Wettest Month (Sep) 9.84"

Driest Month (Jan) 0.08"

Air Quality

Earthquake History

2,802 earthquakes (M2.5+) within 150 km since 1990. Strongest: M7.4. Most recent: M4.3 on Aug 26, 2025.

Jun 23, 2020	9 km SE of Santa María Xadani, Mexico	M7.4	142 km
Apr 7, 2011	7 km SW of Helio García Alfaro, Mexico	M6.6	97 km
Feb 12, 2008	9 km SSW of General Pascual Fentes, Mexico	M6.5	58 km
Sep 30, 1993	90 km S of San Francisco del Mar Viejo, Mexico	M6.5	118 km
Jun 7, 1998	2 km NNE of Cabeza de Toro, Mexico	M6.3	126 km
Sep 23, 2017	7 km NNE of Ixtepec, Mexico	M6.1	32 km
Jul 6, 2007	6 km N of Lázaro Cárdenas, Mexico	M6.1	91 km
Aug 7, 2004	17 km WNW of Palomares, Mexico	M5.9	91 km
Aug 18, 2004	8 km E of Juchitán de Zaragoza, Mexico	M5.9	13 km
Jan 5, 2020	3 km W of Reforma de Pineda, Mexico	M5.9	37 km
Sep 23, 2017	80 km SSW of La Gloria, Mexico	M5.8	117 km
Aug 9, 2023	7 km NNE of Tonalá, Mexico	M5.8	123 km
May 21, 2014	2 km SSW of Palomares, Mexico	M5.8	77 km
Sep 10, 2017	92 km S of San Francisco del Mar Viejo, Mexico	M5.8	124 km
Sep 24, 2017	80 km SSW of Cabeza de Toro, Mexico	M5.8	147 km
Aug 5, 2015	11 km ENE of Tonalá, Mexico	M5.7	130 km
Mar 2, 2023	Oaxaca, Mexico	M5.7	51 km
May 20, 2017	21 km SE of La Horqueta (Poblado Doce), Mexico	M5.7	102 km
Sep 16, 2017	11 km SSE of Salina Cruz, Mexico	M5.6	54 km
Sep 18, 2017	108 km S of San Francisco del Mar Viejo, Mexico	M5.6	138 km

Source: USGS (M2.5+, 1990–2025)

Hurricane History

8 hurricanes (Cat 1+) within 500 km since 1980. Strongest: Category 4. Most recent: Erick (2025).

Year	Name	Category	Closest
2025	Erick	Category 4	274 km
2022	Agatha	Category 2	179 km
2013	Barbara	Category 1	103 km
2012	Carlotta	Category 2	222 km
2005	Stan	Category 1	237 km
1998	Lester	Category 2	225 km
1997	Pauline	Category 4	204 km
1997	Rick	Category 1	140 km

Source: NOAA IBTrACS (Cat 1+, 1980–2026)

Tsunami History

4 tsunamis recorded within 500 km. Highest wave on record: 1.6 m (5 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
2020	OFF COAST OF OAXACA	Earthquake	1.6 m	10	142 km
1965	MEXICO	Earthquake	0.4 m	6	105 km
2022	S. MEXICO	Earthquake	0.2 m	—	125 km
2025	OFF COAST OF OAXACA	Earthquake	0.2 m	—	80 km

Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Nearby Volcanoes

1 volcano within 200 km. Closest: Chichon, El (197 km).

Name	Type	Elevation	Last Eruption	Distance
Chichon, El	Lava dome(s)	1,150 m (3,773 ft)	1982	197 km

Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	77°F (25°C)	0.1 in	Coldest, Driest
February	78°F (26°C)	0.2 in
March	81°F (27°C)	0.2 in
April	84°F (29°C)	0.4 in
May	85°F (30°C)	2.8 in	Warmest
June	83°F (28°C)	8.0 in
July	83°F (28°C)	5.6 in
August	83°F (28°C)	7.6 in
September	82°F (28°C)	9.8 in	Wettest
October	81°F (27°C)	2.7 in
November	80°F (26°C)	0.6 in
December	78°F (25°C)	0.1 in

Unión Hidalgo has a seasonal temperature swing of 9°F / from 77°F in January to 85°F in May. Total annual precipitation is 38.2 inches, with September being the wettest month (9.8") and January the driest (0.1").

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