Helio García Alfaro, Mexico

Full City Profile

1,633 Population 15/sq mi density

207 ft Elevation 63 meters

77°F Avg Temperature 25°C

Helio García Alfaro has a warm climate with an average annual temperature of 77°F (25°C). Winters average 71°F in January while summers reach 80°F in July. The area gets 146 sunny days per year. Annual precipitation totals 125.1 inches. The area receives 0.0 inches of snow annually.

Temperature

71°F Jan (22°C) 80°F Jul (27°C)

Annual Average	77.4°F
	43% above US avg
January Average	71°F (22°C)
July Average	80°F (27°C)
Sunny Days	146 days/yr

Geography

Elevation	207 ft (63 m)
Area	108.9 sq mi (282.0 km²)
Population Density	15/sq mi
Coordinates	17.2597°N, 94.2885°W
Timezone	America/Mexico_City

Precipitation & Snow

Annual Rainfall 125.1"

229% above US avg

Snowfall 0.0"

Wettest Month (Sep) 20.12"

Driest Month (Apr) 2.83"

Air Quality

Earthquake History

1,716 earthquakes (M2.5+) within 150 km since 1990. Strongest: M7.2. Most recent: M4.0 on Aug 20, 2025.

Oct 21, 1995	13 km NW of Ocozocoautla de Espinosa, Mexico	M7.2	99 km
Apr 7, 2011	7 km SW of Helio García Alfaro, Mexico	M6.6	8 km
Feb 12, 2008	9 km SSW of General Pascual Fentes, Mexico	M6.5	100 km
Jul 6, 2007	6 km N of Lázaro Cárdenas, Mexico	M6.1	106 km
Sep 23, 2017	7 km NNE of Ixtepec, Mexico	M6.1	110 km
Jan 5, 2020	3 km W of Reforma de Pineda, Mexico	M5.9	98 km
Aug 7, 2004	17 km WNW of Palomares, Mexico	M5.9	99 km
Feb 25, 2011	3 km NNE of Aguilera, Mexico	M5.9	100 km
Aug 18, 2004	8 km E of Juchitán de Zaragoza, Mexico	M5.9	116 km
Aug 9, 2023	7 km NNE of Tonalá, Mexico	M5.8	137 km
May 21, 2014	2 km SSW of Palomares, Mexico	M5.8	85 km
Mar 2, 2023	Oaxaca, Mexico	M5.7	112 km
Aug 5, 2015	11 km ENE of Tonalá, Mexico	M5.7	141 km
Jul 25, 1991	3 km WNW of Aguilera, Mexico	M5.7	102 km
May 20, 2017	21 km SE of La Horqueta (Poblado Doce), Mexico	M5.7	32 km
Mar 12, 1994	30 km NNE of Santo Domingo Zanatepec, Mexico	M5.6	57 km
Oct 14, 2017	12 km E of San Mateo del Mar, Mexico	M5.5	130 km
Mar 6, 2022	3 km S of Zacatal, Mexico	M5.5	104 km
Apr 28, 2015	4 km NNE of Paso Real de Sarabia, Mexico	M5.5	81 km
Jan 30, 2019	37 km NE of La Horqueta (Poblado Doce), Mexico	M5.4	41 km

Source: USGS (M2.5+, 1990–2025)

Hurricane History

5 hurricanes (Cat 1+) within 500 km since 1980. Strongest: Category 3. Most recent: Agatha (2022).

Year	Name	Category	Closest
2022	Agatha	Category 2	271 km
2013	Barbara	Category 1	125 km
2010	Karl	Category 3	268 km
2005	Stan	Category 1	163 km
1997	Rick	Category 1	237 km

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

Tsunami History

1 tsunami recorded within 500 km. Highest wave on record: 50.0 m (164 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
2007	JUAN DE GRIJALVA, CHIAPAS	Meteorological	50.0 m	19	134 km

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

Nearby Volcanoes

2 volcanoes within 200 km. Closest: Chichon, El (113 km).

Name	Type	Elevation	Last Eruption	Distance
Chichon, El	Lava dome(s)	1,150 m (3,773 ft)	1982	113 km
San Martin	Shield	1,650 m (5,413 ft)	1796	175 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	71°F (22°C)	6.4 in	Coldest
February	72°F (22°C)	4.9 in
March	77°F (25°C)	3.1 in
April	80°F (27°C)	2.8 in	Driest
May	83°F (28°C)	5.3 in	Warmest
June	82°F (28°C)	15.2 in
July	80°F (27°C)	15.7 in
August	80°F (27°C)	17.3 in
September	80°F (27°C)	20.1 in	Wettest
October	78°F (25°C)	15.6 in
November	75°F (24°C)	10.4 in
December	72°F (22°C)	8.3 in

Helio García Alfaro has a seasonal temperature swing of 12°F / from 71°F in January to 83°F in May. Total annual precipitation is 125.1 inches, with September being the wettest month (20.1") and April the driest (2.8").

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