San Sebastián de las Grutas, Mexico

Full City Profile

926 Population 4/sq mi density

5,604 ft Elevation 1,708 meters

67°F Avg Temperature 19°C

San Sebastián de las Grutas enjoys a temperate climate with an average annual temperature of 67°F (19°C). Winters average 63°F in January while summers reach 68°F in July. The area gets 273 sunny days per year. Annual precipitation totals 34.8 inches. The area receives 0.0 inches of snow annually.

Temperature

63°F Jan (17°C) 68°F Jul (20°C)

Annual Average	66.7°F
	24% above US avg
January Average	63°F (17°C)
July Average	68°F (20°C)
Sunny Days	273 days/yr

Geography

Elevation	5,604 ft (1,708 m)
Area	262.6 sq mi (680.0 km²)
Population Density	4/sq mi
Coordinates	16.6319°N, 96.9572°W
Timezone	America/Mexico_City

Precipitation & Snow

Annual Rainfall 34.8"

8% below US avg

Snowfall 0.0"

Wettest Month (Jun) 7.68"

Driest Month (Jan) 0.16"

Air Quality

Earthquake History

1,677 earthquakes (M2.5+) within 150 km since 1990. Strongest: M7.5. Most recent: M4.4 on Aug 21, 2025.

Sep 30, 1999	15 km W of San Baltazar Loxicha, Mexico	M7.5	64 km
Jun 23, 2020	9 km SE of Santa María Xadani, Mexico	M7.4	131 km
Mar 20, 2012	6 km E of Santiago Llano Grande, Mexico	M7.4	137 km
Feb 16, 2018	4 km S of Pinotepa de Don Luis, Mexico	M7.2	112 km
Feb 25, 1996	24 km SSW of Santa María Chico Ometepec, Mexico	M7.1	139 km
Jul 19, 1997	4 km ENE of El Ciruelo, Mexico	M6.9	138 km
Feb 3, 1998	2 km E of Benito Juárez, Mexico	M6.4	109 km
Jun 30, 2010	2 km ESE of San Agustín Chayuco, Mexico	M6.3	92 km
Feb 25, 1996	7 km SE of Santa María Chico Ometepec, Mexico	M6.2	118 km
Apr 2, 2012	7 km SSW of Santa María Cortijo, Mexico	M6.0	147 km
Jun 14, 2004	0 km W of Santa Catarina Mechoacán, Mexico	M5.9	100 km
Feb 19, 2018	4 km SSE of Santiago Tetepec, Mexico	M5.9	91 km
Mar 19, 1996	21 km WSW of Bajos de Chila, Mexico	M5.9	95 km
Apr 1, 1991	11 km SW of Corralero, Mexico	M5.8	150 km
May 8, 2016	3 km WNW of San Agustín Chayuco, Mexico	M5.8	97 km
Feb 17, 2018	8 km SE of José María Morelos, Mexico	M5.8	111 km
Aug 2, 2025	4 km S of Xagacía, Mexico	M5.8	91 km
Jun 27, 2016	8 km S of La Reforma, Mexico	M5.7	94 km
Feb 9, 2010	8 km E of Santa María Colotepec, Mexico	M5.7	83 km
May 24, 2014	2 km S of San Sebastián Ixcapa, Mexico	M5.7	127 km

Source: USGS (M2.5+, 1990–2025)

Hurricane History

12 hurricanes (Cat 1+) within 500 km since 1980. Strongest: Category 5. Most recent: Erick (2025).

Year	Name	Category	Closest
2025	Erick	Category 4	129 km
2024	John	Category 3	193 km
2023	Otis	Category 5	299 km
2022	Agatha	Category 2	101 km
2017	Max	Category 1	207 km
2012	Carlotta	Category 2	70 km
2011	Hilary	Category 2	253 km
2010	Karl	Category 3	253 km
1998	Lester	Category 2	238 km
1997	Pauline	Category 4	98 km
1997	Rick	Category 2	85 km
1989	Cosme	Category 1	220 km

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

Tsunami History

9 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	131 km
1965	MEXICO	Earthquake	0.4 m	6	129 km
1950	S. MEXICO	Earthquake	0.3 m	—	136 km
2022	S. MEXICO	Earthquake	0.2 m	—	118 km
2012	S. MEXICO	Earthquake	0.2 m	2	137 km
1928	S. MEXICO	Earthquake	0.2 m	4	68 km
1996	MEXICO	Earthquake	0.1 m	—	139 km
1968	ACAPULCO	Earthquake	—	18	84 km
1928	MEXICO	Earthquake	—	—	141 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	63°F (17°C)	0.2 in	Coldest, Driest
February	65°F (18°C)	0.3 in
March	68°F (20°C)	0.4 in
April	69°F (21°C)	1.3 in
May	70°F (21°C)	3.8 in	Warmest
June	68°F (20°C)	7.7 in	Wettest
July	68°F (20°C)	5.6 in
August	67°F (20°C)	6.1 in
September	67°F (20°C)	5.9 in
October	66°F (19°C)	2.6 in
November	65°F (18°C)	0.6 in
December	64°F (18°C)	0.3 in

San Sebastián de las Grutas has a seasonal temperature swing of 7°F / from 63°F in January to 70°F in May. Total annual precipitation is 34.8 inches, with June being the wettest month (7.7") and January the driest (0.2").

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