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Weather & Climate in San Sebastián de las Grutas, Mexico
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
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 / relatively mild seasonal variation. The area gets 273 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 34.8 inches. The city sits at an elevation of 5,604 feet.
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
Air Quality
Earthquake History
1,677 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.5.
| Sep 30, 1999 | 15 km W of San Baltazar Loxicha, Mexico | M7.5 | 64 km | 61 km |
| Jun 23, 2020 | 9 km SE of Santa María Xadani, Mexico | M7.4 | 131 km | 20 km |
| Mar 20, 2012 | 6 km E of Santiago Llano Grande, Mexico | M7.4 | 137 km | 20 km |
| Feb 16, 2018 | 4 km S of Pinotepa de Don Luis, Mexico | M7.2 | 112 km | 22 km |
| Feb 25, 1996 | 24 km SSW of Santa María Chico Ometepec, Mexico | M7.1 | 139 km | 21 km |
| Jul 19, 1997 | 4 km ENE of El Ciruelo, Mexico | M6.9 | 138 km | 33 km |
| Feb 3, 1998 | 2 km E of Benito Juárez, Mexico | M6.4 | 109 km | 33 km |
| Jun 30, 2010 | 2 km ESE of San Agustín Chayuco, Mexico | M6.3 | 92 km | 20 km |
| Feb 25, 1996 | 7 km SE of Santa María Chico Ometepec, Mexico | M6.2 | 118 km | 12 km |
| Apr 2, 2012 | 7 km SSW of Santa María Cortijo, Mexico | M6.0 | 147 km | 9 km |
| Jun 14, 2004 | 0 km W of Santa Catarina Mechoacán, Mexico | M5.9 | 100 km | 10 km |
| Feb 19, 2018 | 4 km SSE of Santiago Tetepec, Mexico | M5.9 | 91 km | 22 km |
| Mar 19, 1996 | 21 km WSW of Bajos de Chila, Mexico | M5.9 | 95 km | 33 km |
| Apr 1, 1991 | 11 km SW of Corralero, Mexico | M5.8 | 150 km | 21 km |
| May 8, 2016 | 3 km WNW of San Agustín Chayuco, Mexico | M5.8 | 97 km | 22 km |
| Feb 17, 2018 | 8 km SE of José María Morelos, Mexico | M5.8 | 111 km | 3 km |
| Aug 2, 2025 | 4 km S of Xagacía, Mexico | M5.8 | 91 km | 63 km |
| Jun 27, 2016 | 8 km S of La Reforma, Mexico | M5.7 | 94 km | 19 km |
| Feb 9, 2010 | 8 km E of Santa María Colotepec, Mexico | M5.7 | 83 km | 40 km |
| May 24, 2014 | 2 km S of San Sebastián Ixcapa, Mexico | M5.7 | 127 km | 17 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
12 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Erick | Category 4 | 138 mph | 129 km |
| 2024 | John | Category 3 | 121 mph | 193 km |
| 2023 | Otis | Category 5 | 167 mph | 299 km |
| 2022 | Agatha | Category 2 | 109 mph | 101 km |
| 2017 | Max | Category 1 | 92 mph | 207 km |
| 2012 | Carlotta | Category 2 | 109 mph | 70 km |
| 2011 | Hilary | Category 2 | 104 mph | 253 km |
| 2010 | Karl | Category 3 | 115 mph | 253 km |
| 1998 | Lester | Category 2 | 104 mph | 238 km |
| 1997 | Pauline | Category 4 | 132 mph | 98 km |
| 1997 | Rick | Category 2 | 92 mph | 85 km |
| 1989 | Cosme | Category 1 | 86 mph | 220 km |
Source: NOAA IBTrACS (Category 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.
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").