Río Seco, Mexico

Full City Profile

654 Population 2/sq mi density

85 ft Elevation 26 meters

82°F Avg Temperature 28°C

Río Seco has a warm climate with an average annual temperature of 82°F (28°C). Winters average 80°F in January while summers reach 82°F in July. The area gets 266 sunny days per year. Annual precipitation totals 38.6 inches. The area receives 0.0 inches of snow annually.

Temperature

80°F Jan (27°C) 82°F Jul (28°C)

Annual Average	81.8°F
	51% above US avg
January Average	80°F (27°C)
July Average	82°F (28°C)
Sunny Days	266 days/yr

Geography

Elevation	85 ft (26 m)
Area	273.8 sq mi (709.1 km²)
Population Density	2/sq mi
Coordinates	15.9356°N, 95.7523°W
Timezone	America/Mexico_City

Precipitation & Snow

Annual Rainfall 38.6"

2% above US avg

Snowfall 0.0"

Wettest Month (Jun) 9.13"

Driest Month (Jan) 0.08"

Air Quality

Earthquake History

2,047 earthquakes (M2.5+) within 150 km since 1990. Strongest: M7.5. Most recent: M4.1 on Aug 28, 2025.

Sep 30, 1999	15 km W of San Baltazar Loxicha, Mexico	M7.5	127 km
Jun 23, 2020	9 km SE of Santa María Xadani, Mexico	M7.4	28 km
Sep 30, 1993	90 km S of San Francisco del Mar Viejo, Mexico	M6.5	127 km
Feb 3, 1998	2 km E of Benito Juárez, Mexico	M6.4	59 km
Sep 23, 2017	7 km NNE of Ixtepec, Mexico	M6.1	105 km
Aug 18, 2004	8 km E of Juchitán de Zaragoza, Mexico	M5.9	102 km
Jan 5, 2020	3 km W of Reforma de Pineda, Mexico	M5.9	145 km
Sep 10, 2017	92 km S of San Francisco del Mar Viejo, Mexico	M5.8	144 km
Aug 2, 2025	4 km S of Xagacía, Mexico	M5.8	142 km
Mar 2, 2023	Oaxaca, Mexico	M5.7	148 km
Feb 9, 2010	8 km E of Santa María Colotepec, Mexico	M5.7	119 km
Aug 28, 1994	6 km N of San Pedro Ocotepec, Mexico	M5.6	120 km
Jan 21, 2019	72 km S of San Francisco del Mar Viejo, Mexico	M5.6	116 km
Sep 16, 2017	11 km SSE of Salina Cruz, Mexico	M5.6	68 km
Sep 18, 2017	108 km S of San Francisco del Mar Viejo, Mexico	M5.6	148 km
Jun 7, 2002	4 km N of Santa Catarina Loxicha, Mexico	M5.6	108 km
Apr 11, 2018	57 km SSE of Salina Cruz, Mexico	M5.5	84 km
Mar 5, 2025	60 km SSE of Santa Gertrudis Miramar, Mexico	M5.5	80 km
May 25, 2022	12 km WNW of Santa María Zapotitlán, Mexico	M5.5	34 km
Apr 10, 2016	5 km ESE of Santa Cruz Ozolotepec, Mexico	M5.5	56 km

Source: USGS (M2.5+, 1990–2025)

Hurricane History

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

Year	Name	Category	Closest
2025	Erick	Category 4	161 km
2024	John	Category 2	295 km
2022	Agatha	Category 2	69 km
2022	Bonnie	Category 1	296 km
2013	Barbara	Category 1	168 km
2012	Carlotta	Category 2	108 km
1998	Lester	Category 2	160 km
1997	Pauline	Category 4	92 km
1997	Rick	Category 1	27 km
1996	Douglas	Category 1	273 km

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

Tsunami History

7 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	28 km
1965	MEXICO	Earthquake	0.4 m	6	41 km
2022	S. MEXICO	Earthquake	0.2 m	—	34 km
1928	S. MEXICO	Earthquake	0.2 m	4	138 km
2025	OFF COAST OF OAXACA	Earthquake	0.2 m	—	76 km
1928	MEXICO	Earthquake	—	—	48 km
1870	PUERTO ANGEL, MEXICO	Earthquake	—	24	84 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	80°F (27°C)	0.1 in	Coldest, Driest
February	80°F (27°C)	0.2 in
March	82°F (28°C)	0.3 in
April	83°F (29°C)	0.6 in
May	85°F (29°C)	2.8 in	Warmest
June	82°F (28°C)	9.1 in	Wettest
July	82°F (28°C)	5.6 in
August	82°F (28°C)	7.6 in
September	81°F (27°C)	8.8 in
October	81°F (27°C)	3.0 in
November	82°F (28°C)	0.6 in
December	80°F (27°C)	0.1 in

Río Seco has a seasonal temperature swing of 5°F / from 80°F in January to 85°F in May. Total annual precipitation is 38.6 inches, with June being the wettest month (9.1") and January the driest (0.1").

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