Santo Tomás de Arriba, Mexico

Full City Profile

613 Population 7/sq mi density

6,913 ft Elevation 2,107 meters

71°F Avg Temperature 22°C

Santo Tomás de Arriba has a warm climate with an average annual temperature of 71°F (22°C). Winters average 68°F in January while summers reach 71°F in July. The area gets 282 sunny days per year. Annual precipitation totals 29.8 inches. The area receives 0.0 inches of snow annually.

Temperature

68°F Jan (20°C) 71°F Jul (22°C)

Annual Average	71.0°F
	31% above US avg
January Average	68°F (20°C)
July Average	71°F (22°C)
Sunny Days	282 days/yr

Geography

Elevation	6,913 ft (2,107 m)
Area	87.2 sq mi (225.8 km²)
Population Density	7/sq mi
Coordinates	16.7772°N, 96.2364°W
Timezone	America/Mexico_City

Precipitation & Snow

Annual Rainfall 29.8"

21% below US avg

Snowfall 0.0"

Wettest Month (Jun) 6.22"

Driest Month (Jan) 0.12"

Air Quality

Earthquake History

1,510 earthquakes (M2.5+) within 150 km since 1990. Strongest: M7.5. Most recent: M5.8 on Aug 2, 2025.

Sep 30, 1999	15 km W of San Baltazar Loxicha, Mexico	M7.5	109 km
Jun 23, 2020	9 km SE of Santa María Xadani, Mexico	M7.4	102 km
Feb 3, 1998	2 km E of Benito Juárez, Mexico	M6.4	100 km
Jul 29, 2014	2 km SE of Santa Teresa, Mexico	M6.3	118 km
Sep 23, 2017	7 km NNE of Ixtepec, Mexico	M6.1	125 km
Aug 7, 2004	17 km WNW of Palomares, Mexico	M5.9	118 km
Aug 18, 2004	8 km E of Juchitán de Zaragoza, Mexico	M5.9	143 km
May 21, 2014	2 km SSW of Palomares, Mexico	M5.8	130 km
Aug 2, 2025	4 km S of Xagacía, Mexico	M5.8	37 km
Feb 9, 2010	8 km E of Santa María Colotepec, Mexico	M5.7	119 km
Jun 7, 2002	4 km N of Santa Catarina Loxicha, Mexico	M5.6	92 km
Mar 15, 2025	5 km W of San Pedro Tidaá, Mexico	M5.6	141 km
Sep 16, 2017	11 km SSE of Salina Cruz, Mexico	M5.6	140 km
Aug 28, 1994	6 km N of San Pedro Ocotepec, Mexico	M5.6	49 km
Jul 24, 2020	26 km SSE of Crucecita, Mexico	M5.5	137 km
Mar 6, 2022	3 km S of Zacatal, Mexico	M5.5	111 km
May 25, 2022	12 km WNW of Santa María Zapotitlán, Mexico	M5.5	74 km
Jan 13, 2004	15 km SSW of San Jerónimo Coatlán, Mexico	M5.5	106 km
Oct 11, 2002	29 km SSE of El Coyul, Mexico	M5.5	136 km
Apr 10, 2016	5 km ESE of Santa Cruz Ozolotepec, Mexico	M5.5	80 km

Source: USGS (M2.5+, 1990–2025)

Hurricane History

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

Year	Name	Category	Closest
2025	Erick	Category 4	196 km
2024	John	Category 3	270 km
2022	Agatha	Category 2	99 km
2017	Max	Category 1	284 km
2013	Barbara	Category 1	248 km
2012	Carlotta	Category 2	130 km
2010	Karl	Category 3	244 km
2005	Stan	Category 1	247 km
1998	Lester	Category 2	254 km
1997	Pauline	Category 4	139 km
1997	Rick	Category 1	101 km
1989	Cosme	Category 1	294 km

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

Tsunami History

5 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	102 km
1965	MEXICO	Earthquake	0.4 m	6	71 km
2022	S. MEXICO	Earthquake	0.2 m	—	74 km
1928	S. MEXICO	Earthquake	0.2 m	4	119 km
1928	MEXICO	Earthquake	—	—	124 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	68°F (20°C)	0.1 in	Coldest, Driest
February	69°F (21°C)	0.3 in
March	72°F (22°C)	0.4 in
April	74°F (23°C)	1.0 in
May	75°F (24°C)	2.9 in	Warmest
June	73°F (23°C)	6.2 in	Wettest
July	71°F (22°C)	5.1 in
August	72°F (22°C)	5.5 in
September	71°F (22°C)	5.7 in
October	70°F (21°C)	2.1 in
November	69°F (21°C)	0.5 in
December	68°F (20°C)	0.2 in

Santo Tomás de Arriba has a seasonal temperature swing of 7°F / from 68°F in January to 75°F in May. Total annual precipitation is 29.8 inches, with June being the wettest month (6.2") and January the driest (0.1").

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