San Francisco del Mar Viejo, Mexico

Full City Profile

4,033 Population 5/sq mi density

26 ft Elevation 8 meters

82°F Avg Temperature 28°C

San Francisco del Mar Viejo has a warm climate with an average annual temperature of 82°F (28°C). Winters average 77°F in January while summers reach 83°F in July. The area gets 262 sunny days per year. Annual precipitation totals 41.0 inches. The area receives 0.0 inches of snow annually.

Temperature

77°F Jan (25°C) 83°F Jul (29°C)

Annual Average	81.5°F
	51% above US avg
January Average	77°F (25°C)
July Average	83°F (29°C)
Sunny Days	262 days/yr

Geography

Elevation	26 ft (8 m)
Area	904.1 sq mi (2,341.6 km²)
Population Density	5/sq mi
Coordinates	16.2319°N, 94.6330°W
Timezone	America/Mexico_City

Precipitation & Snow

Annual Rainfall 41.0"

8% above US avg

Snowfall 0.0"

Wettest Month (Sep) 10.16"

Driest Month (Mar) 0.08"

Air Quality

Earthquake History

2,972 earthquakes (M2.5+) within 150 km since 1990. Strongest: M7.2. Most recent: M4.3 on Aug 26, 2025.

Oct 21, 1995	13 km NW of Ocozocoautla de Espinosa, Mexico	M7.2	141 km
Apr 7, 2011	7 km SW of Helio García Alfaro, Mexico	M6.6	113 km
Feb 12, 2008	9 km SSW of General Pascual Fentes, Mexico	M6.5	38 km
Sep 30, 1993	90 km S of San Francisco del Mar Viejo, Mexico	M6.5	91 km
Jun 7, 1998	2 km NNE of Cabeza de Toro, Mexico	M6.3	97 km
Jul 6, 2007	6 km N of Lázaro Cárdenas, Mexico	M6.1	70 km
Sep 23, 2017	7 km NNE of Ixtepec, Mexico	M6.1	65 km
Sep 6, 1995	119 km SW of Manuel Ávila Camacho (Ponte Duro), Mexico	M6.0	149 km
Jan 5, 2020	3 km W of Reforma de Pineda, Mexico	M5.9	24 km
Aug 7, 2004	17 km WNW of Palomares, Mexico	M5.9	124 km
Aug 18, 2004	8 km E of Juchitán de Zaragoza, Mexico	M5.9	40 km
Jun 27, 2006	108 km SSW of Manuel Ávila Camacho (Ponte Duro), Mexico	M5.8	148 km
Aug 9, 2023	7 km NNE of Tonalá, Mexico	M5.8	97 km
Sep 10, 2017	92 km S of San Francisco del Mar Viejo, Mexico	M5.8	93 km
May 21, 2014	2 km SSW of Palomares, Mexico	M5.8	109 km
Sep 24, 2017	80 km SSW of Cabeza de Toro, Mexico	M5.8	114 km
Sep 23, 2017	80 km SSW of La Gloria, Mexico	M5.8	85 km
May 20, 2017	21 km SE of La Horqueta (Poblado Doce), Mexico	M5.7	108 km
Sep 8, 2017	100 km SSW of Cabeza de Toro, Mexico	M5.7	122 km
Mar 2, 2023	Oaxaca, Mexico	M5.7	24 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	275 km
2022	Agatha	Category 2	192 km
2013	Barbara	Category 1	72 km
2012	Carlotta	Category 2	232 km
2005	Stan	Category 1	265 km
1998	Lester	Category 2	205 km
1997	Pauline	Category 4	206 km
1997	Rick	Category 1	151 km

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

Tsunami History

3 tsunamis recorded within 500 km. Highest wave on record: 0.4 m (1 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
1965	MEXICO	Earthquake	0.4 m	6	125 km
2022	S. MEXICO	Earthquake	0.2 m	—	142 km
2025	OFF COAST OF OAXACA	Earthquake	0.2 m	—	67 km

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

Nearby Volcanoes

1 volcano within 200 km. Closest: Chichon, El (195 km).

Name	Type	Elevation	Last Eruption	Distance
Chichon, El	Lava dome(s)	1,150 m (3,773 ft)	1982	195 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	77°F (25°C)	0.0 in	Coldest, Driest
February	79°F (26°C)	0.2 in
March	81°F (27°C)	0.1 in
April	84°F (29°C)	0.4 in
May	85°F (30°C)	3.9 in	Warmest
June	83°F (29°C)	8.3 in
July	83°F (29°C)	5.7 in
August	83°F (28°C)	9.7 in
September	82°F (28°C)	10.2 in	Wettest
October	81°F (27°C)	2.3 in
November	80°F (27°C)	0.4 in
December	78°F (26°C)	0.0 in

San Francisco del Mar Viejo has a seasonal temperature swing of 8°F / from 77°F in January to 85°F in May. Total annual precipitation is 41.0 inches, with September being the wettest month (10.2") and January the driest (0.0").

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