Llano Silleta, Mexico

Full City Profile

521 Population 1/sq mi density

2,579 ft Elevation 786 meters

73°F Avg Temperature 23°C

Llano Silleta has a warm climate with an average annual temperature of 73°F (23°C). Winters average 70°F in January while summers reach 73°F in July. The area gets 358 sunny days per year. Annual precipitation totals 47.6 inches. The area receives 0.0 inches of snow annually.

Temperature

70°F Jan (21°C) 73°F Jul (23°C)

Annual Average	73.1°F
	35% above US avg
January Average	70°F (21°C)
July Average	73°F (23°C)
Sunny Days	358 days/yr

Geography

Elevation	2,579 ft (786 m)
Area	574.1 sq mi (1,487.0 km²)
Population Density	1/sq mi
Coordinates	16.9381°N, 98.6125°W
Timezone	America/Mexico_City

Precipitation & Snow

Annual Rainfall 47.6"

25% above US avg

Snowfall 0.0"

Wettest Month (Sep) 13.66"

Driest Month (Mar) 0.16"

Air Quality

Earthquake History

2,688 earthquakes (M2.5+) within 150 km since 1990. Strongest: M7.4. Most recent: M4.8 on Jun 11, 2025.

Mar 20, 2012	6 km E of Santiago Llano Grande, Mexico	M7.4	64 km
Sep 14, 1995	5 km N of Azoyú, Mexico	M7.4	18 km
Feb 16, 2018	4 km S of Pinotepa de Don Luis, Mexico	M7.2	91 km
Feb 25, 1996	24 km SSW of Santa María Chico Ometepec, Mexico	M7.1	121 km
Jul 19, 1997	4 km ENE of El Ciruelo, Mexico	M6.9	79 km
Oct 24, 1993	1 km ENE of Jolotichán, Mexico	M6.7	23 km
Jun 30, 2010	2 km ESE of San Agustín Chayuco, Mexico	M6.3	107 km
Aug 21, 2013	5 km ESE of Barrio Nuevo de los Muertos, Mexico	M6.2	94 km
Feb 25, 1996	7 km SE of Santa María Chico Ometepec, Mexico	M6.2	116 km
May 15, 1993	1 km ENE of Ometepec, Mexico	M6.1	35 km
Apr 2, 2012	7 km SSW of Santa María Cortijo, Mexico	M6.0	68 km
May 15, 1993	2 km SSW of Ometepec, Mexico	M6.0	36 km
Dec 16, 1997	46 km SSW of Barra de Tecoanapa, Mexico	M6.0	96 km
Nov 13, 1993	18 km SW of Montecillos, Mexico	M6.0	72 km
Oct 8, 2001	3 km WSW of Tixtlancingo, Mexico	M5.9	148 km
Jun 14, 2004	0 km W of Santa Catarina Mechoacán, Mexico	M5.9	106 km
Feb 19, 2018	4 km SSE of Santiago Tetepec, Mexico	M5.9	119 km
Apr 1, 1991	11 km SW of Corralero, Mexico	M5.8	92 km
Apr 27, 2009	2 km WNW of Pochotillo, Mexico	M5.8	89 km
Jun 16, 2013	5 km N of Tequicuilco, Mexico	M5.8	149 km

Source: USGS (M2.5+, 1990–2025)

Hurricane History

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

Year	Name	Category	Closest
2025	Erick	Category 4	34 km
2024	John	Category 3	49 km
2023	Otis	Category 5	129 km
2022	Agatha	Category 2	245 km
2017	Max	Category 1	41 km
2015	Carlos	Category 1	208 km
2012	Carlotta	Category 2	90 km
2011	Hilary	Category 4	181 km
2010	Karl	Category 3	291 km
2006	John	Category 3	271 km
1998	Lester	Category 2	294 km
1997	Pauline	Category 4	49 km
1997	Rick	Category 2	145 km
1996	Boris	Category 1	205 km
1993	Calvin	Category 2	256 km
1989	Cosme	Category 1	41 km
1984	Odile	Category 2	230 km

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

Tsunami History

17 tsunamis recorded within 500 km. Highest wave on record: 4.0 m (13 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
1820	S. MEXICO	Earthquake	4.0 m	—	109 km
1787	SAN MARCOS	Earthquake	4.0 m	11	50 km
1754	S. MEXICO	Earthquake	4.0 m	—	64 km
1732	S. MEXICO	Earthquake	3.0 m	—	138 km
1907	S. MEXICO	Earthquake	2.0 m	8	148 km
1957	S. MEXICO	Earthquake	1.3 m	65	71 km
1962	S. MEXICO	Earthquake	0.8 m	4	109 km
2021	S. MEXICO	Earthquake	0.5 m	3	124 km
1995	S. MEXICO	Earthquake	0.4 m	3	18 km
1962	S. MEXICO	Earthquake	0.3 m	3	99 km
1950	S. MEXICO	Earthquake	0.3 m	—	66 km
2012	S. MEXICO	Earthquake	0.2 m	2	64 km
1996	MEXICO	Earthquake	0.1 m	—	121 km
2026	ACAPULCO	Earthquake	0.1 m	2	74 km
1968	ACAPULCO	Earthquake	—	18	104 km
1868	S. MEXICO	Earthquake	—	—	138 km
1833	S. MEXICO	Earthquake	—	—	138 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	70°F (21°C)	0.4 in	Coldest
February	73°F (23°C)	0.2 in
March	75°F (24°C)	0.2 in	Driest
April	78°F (25°C)	0.3 in
May	79°F (26°C)	2.6 in	Warmest
June	78°F (25°C)	11.6 in
July	73°F (23°C)	11.8 in
August	77°F (25°C)	11.9 in
September	76°F (24°C)	13.7 in	Wettest
October	76°F (24°C)	6.4 in
November	74°F (23°C)	1.1 in
December	73°F (23°C)	0.3 in

Llano Silleta has a seasonal temperature swing of 8°F / from 70°F in January to 79°F in May. Total annual precipitation is 60.4 inches, with September being the wettest month (13.7") and March the driest (0.2").

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