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Weather & Climate in San Sebastian, Philippines
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
San Sebastian has a warm climate with an average annual temperature of 80°F (27°C). Winters average 79°F in January while summers reach 80°F in July / relatively mild seasonal variation. The area gets 328 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 101.9 inches (wetter than the 38-inch national average). The city sits at an elevation of 30 feet.
Temperature
79°F Jan (26°C)
80°F Jul (27°C)
| Annual Average | 80.0°F |
| 48% above US avg | |
| January Average | 79°F (26°C) |
| July Average | 80°F (27°C) |
| Sunny Days | 328 days/yr |
Geography
| Elevation | 30 ft (9 m) |
| Area | 29.6 sq mi (76.6 km²) |
| Population Density | 95/sq mi |
| Coordinates | 17.6233°N, 120.3635°W |
| Timezone | Asia/Manila |
Precipitation & Snow
Air Quality
Earthquake History
583 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.0.
| Jul 27, 2022 | 11 km NE of Bantay, Philippines | M7.0 | 50 km | 34 km |
| Jul 17, 1990 | 14 km NNW of Salinas, Philippines | M6.5 | 142 km | 23 km |
| Mar 19, 1992 | 7 km NNW of Besao, Philippines | M6.3 | 72 km | 15 km |
| Jul 17, 1990 | 10 km ESE of Ambuclao, Philippines | M6.1 | 142 km | 18 km |
| Nov 20, 1996 | 3 km ENE of Taloy, Philippines | M5.9 | 143 km | 33 km |
| Mar 22, 2010 | 9 km SSW of Bangui, Philippines | M5.9 | 100 km | 32 km |
| Jun 5, 1995 | 14 km SE of Bangui, Philippines | M5.8 | 104 km | 48 km |
| May 6, 1998 | 19 km NW of Claveria, Philippines | M5.8 | 136 km | 33 km |
| Apr 8, 1997 | 29 km ENE of Piddig, Philippines | M5.8 | 99 km | 71 km |
| Sep 14, 2003 | 8 km NW of Claveria, Philippines | M5.7 | 136 km | 64 km |
| Jan 13, 2008 | 4 km SSE of Bontoc, Philippines | M5.7 | 92 km | 10 km |
| Jul 16, 1990 | 2 km NNE of Caronoan West, Philippines | M5.7 | 149 km | 13 km |
| Jun 14, 2000 | 24 km W of Tamorong, Philippines | M5.7 | 38 km | 63 km |
| Jul 18, 2000 | 15 km ESE of Espiritu, Philippines | M5.7 | 54 km | 33 km |
| Jun 19, 2000 | 4 km WNW of Santa Maria, Philippines | M5.7 | 73 km | 33 km |
| Jul 21, 1990 | 11 km WNW of Salinas, Philippines | M5.7 | 148 km | 26 km |
| Oct 7, 2012 | 16 km E of Pagudpud, Philippines | M5.6 | 119 km | 40 km |
| Jul 23, 1990 | 6 km S of Loacan, Philippines | M5.6 | 130 km | 20 km |
| Jul 16, 1990 | 2 km N of Halog West, Philippines | M5.6 | 138 km | 18 km |
| Mar 2, 2019 | 30 km NW of Davila, Philippines | M5.6 | 115 km | 16 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
103 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Ragasa | Category 5 | — | 198 km |
| 2025 | Fung-wong | Category 3 | — | 107 km |
| 2025 | Co-may | Category 1 | — | 193 km |
| 2025 | Matmo | Category 1 | — | 90 km |
| 2024 | Yinxing | Category 4 | 115 mph | 98 km |
| 2024 | Man-yi | Category 4 | 115 mph | 70 km |
| 2024 | Usagi | Category 4 | 109 mph | 162 km |
| 2024 | Yagi | Category 1 | 81 mph | 293 km |
| 2024 | Toraji | Category 1 | 81 mph | 105 km |
| 2023 | Saola | Category 5 | 121 mph | 278 km |
| 2023 | Doksuri | Category 4 | 115 mph | 179 km |
| 2022 | Noru | Category 4 | 109 mph | 241 km |
| 2022 | Ma-on | Category 1 | — | 195 km |
| 2022 | Nesat | Category 1 | 63 mph | 223 km |
| 2021 | Chanthu | Category 5 | 132 mph | 279 km |
| 2020 | Vamco | Category 2 | 81 mph | 271 km |
| 2019 | Kalmaegi | Category 2 | 81 mph | 217 km |
| 2018 | Mangkhut | Category 5 | 127 mph | 64 km |
| 2018 | Yutu | Category 3 | 92 mph | 115 km |
| 2016 | Sarika | Category 4 | 109 mph | 166 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
5 tsunamis recorded within 500 km. Highest wave on record: 1.0 m (3 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1988 | NORTH OF LUZON ISLAND | Earthquake | 1.0 m | — | 129 km |
| 2022 | N. LUZON ISLAND | Earthquake | 0.1 m | 11 | 50 km |
| 1983 | LUZON ISLAND | Earthquake | — | 16 | 86 km |
| 1934 | SOUTH CHINA SEA | Earthquake | — | — | 145 km |
| 1915 | W. LUZON ISLAND | Earthquake | — | — | 101 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Ambalatungan Group (85 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Ambalatungan Group | Compound | 2,329 m (7,641 ft) | Unknown | 85 km |
| Cagua | Stratovolcano | 1,133 m (3,717 ft) | 1860 | 198 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 79°F (26°C) | 0.2 in | Driest |
| February | 78°F (25°C) | 0.3 in | Coldest |
| March | 80°F (27°C) | 0.4 in | |
| April | 83°F (28°C) | 1.1 in | |
| May | 84°F (29°C) | 8.6 in | Warmest |
| June | 82°F (28°C) | 15.2 in | |
| July | 80°F (27°C) | 22.9 in | |
| August | 80°F (27°C) | 26.9 in | Wettest |
| September | 80°F (27°C) | 14.1 in | |
| October | 81°F (27°C) | 6.3 in | |
| November | 80°F (27°C) | 2.1 in | |
| December | 78°F (26°C) | 0.5 in |
San Sebastian has a seasonal temperature swing of 6°F / from 78°F in February to 84°F in May. Total annual precipitation is 98.5 inches, with August being the wettest month (26.9") and January the driest (0.2").