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Weather & Climate in San Sebastián, Mexico
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
San Sebastián has a warm climate with an average annual temperature of 76°F (25°C). Winters average 69°F in January while summers reach 83°F in July / relatively mild seasonal variation. The area gets 306 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 39.0 inches. The city sits at an elevation of 371 feet.
Temperature
69°F Jan (20°C)
83°F Jul (28°C)
| Annual Average | 76.1°F |
| 41% above US avg | |
| January Average | 69°F (20°C) |
| July Average | 83°F (28°C) |
| Sunny Days | 306 days/yr |
Geography
| Elevation | 371 ft (113 m) |
| Area | 677.1 sq mi (1,753.6 km²) |
| Population Density | 2/sq mi |
| Coordinates | 21.2166°N, 98.1319°W |
| Timezone | America/Mexico_City |
Precipitation & Snow
Air Quality
Earthquake History
22 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.2.
| Jun 25, 2011 | 6 km NE of Purísima de Arista, Mexico | M4.2 | 139 km | 10 km |
| Mar 11, 1998 | 12 km ESE of Santa Catarina, Mexico | M4.1 | 137 km | 5 km |
| May 22, 2001 | 13 km WSW of Tamápatz, Mexico | M4.1 | 117 km | 17 km |
| Jun 25, 2011 | 6 km N of Landa de Matamoros, Mexico | M4.1 | 122 km | 3 km |
| Jul 25, 2002 | 13 km SW of Agua Zarca, Mexico | M4.1 | 108 km | 5 km |
| Jul 21, 2011 | 1 km SW of Tocoy, Mexico | M4.0 | 90 km | 12 km |
| Mar 26, 2011 | 15 km WSW of Tamápatz, Mexico | M4.0 | 118 km | 9 km |
| Jun 27, 2011 | 17 km WSW of Tamápatz, Mexico | M4.0 | 117 km | 8 km |
| Apr 17, 2010 | 5 km SSE of Pozuelos, Mexico | M4.0 | 127 km | 2 km |
| Sep 23, 2013 | 2 km ENE of Chilcuautla, Mexico | M4.0 | 148 km | 5 km |
| Jul 4, 2005 | 1 km S of Pisaflores, Mexico | M3.9 | 90 km | 16 km |
| May 20, 2010 | 3 km N of La Estancia, Mexico | M3.9 | 125 km | 5 km |
| Apr 8, 1998 | 9 km NNW of Jacala, Mexico | M3.7 | 116 km | 35 km |
| Mar 11, 1998 | 12 km E of Concá, Mexico | M3.7 | 145 km | 20 km |
| Jan 24, 2006 | 1 km ENE of Chilcuautla, Mexico | M3.7 | 150 km | 5 km |
| May 26, 2000 | 17 km W of Jacala, Mexico | M3.6 | 129 km | 85 km |
| Apr 18, 2001 | 3 km NNE of Orizabita, Mexico | M3.6 | 130 km | 60 km |
| Mar 24, 1999 | 15 km SSW of Jacala, Mexico | M3.5 | 120 km | 8 km |
| Dec 22, 1998 | 5 km WSW of Almoloya, Mexico | M3.5 | 126 km | 4 km |
| Sep 19, 1999 | 5 km NNW of Tasquillo, Mexico | M3.4 | 144 km | 14 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
13 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2021 | Grace | Category 3 | 121 mph | 92 km |
| 2017 | Katia | Category 2 | 104 mph | 127 km |
| 2017 | Franklin | Category 1 | 86 mph | 209 km |
| 2013 | Ingrid | Category 1 | 81 mph | 277 km |
| 2010 | Karl | Category 3 | 127 mph | 288 km |
| 2010 | Alex | Category 1 | — | 298 km |
| 2007 | Dean | Category 2 | 98 mph | 118 km |
| 2007 | Lorenzo | Category 1 | 81 mph | 134 km |
| 2000 | Keith | Category 1 | 92 mph | 133 km |
| 1996 | Dolly | Category 1 | 81 mph | 62 km |
| 1993 | Gert | Category 2 | 98 mph | 22 km |
| 1990 | Diana | Category 2 | 98 mph | 84 km |
| 1988 | Debby | Category 1 | 75 mph | 104 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Nearby Volcanoes
1 volcano within 200 km. Closest: Humeros, Los (185 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Humeros, Los | Caldera(s) | 3,150 m (10,335 ft) | -4470 | 185 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 69°F (20°C) | 1.8 in | |
| February | 67°F (20°C) | 1.6 in | |
| March | 73°F (23°C) | 1.3 in | Driest |
| April | 78°F (25°C) | 2.2 in | |
| May | 82°F (28°C) | 3.2 in | |
| June | 82°F (28°C) | 6.8 in | |
| July | 83°F (28°C) | 7.0 in | Warmest |
| August | 81°F (27°C) | 6.5 in | |
| September | 79°F (26°C) | 10.5 in | Wettest |
| October | 75°F (24°C) | 5.8 in | |
| November | 71°F (21°C) | 3.0 in | |
| December | 66°F (19°C) | 2.1 in | Coldest |
San Sebastián has a seasonal temperature swing of 17°F / from 66°F in December to 83°F in July. Total annual precipitation is 51.7 inches, with September being the wettest month (10.5") and March the driest (1.3").