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Weather & Climate in San Alfonso, Philippines
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
San Alfonso has a warm climate with an average annual temperature of 79°F (26°C). Winters average 77°F in January while summers reach 80°F in July / relatively mild seasonal variation. The area gets 140 sunny days per year, below the national average of 205. Annual precipitation totals 120.3 inches (wetter than the 38-inch national average). The city sits at an elevation of 95 feet.
Temperature
77°F Jan (25°C)
80°F Jul (27°C)
| Annual Average | 79.3°F |
| 47% above US avg | |
| January Average | 77°F (25°C) |
| July Average | 80°F (27°C) |
| Sunny Days | 140 days/yr |
Geography
| Elevation | 95 ft (29 m) |
| Area | 210.6 sq mi (545.6 km²) |
| Population Density | 16/sq mi |
| Coordinates | 7.7803°N, 126.4203°W |
| Timezone | Asia/Manila |
Precipitation & Snow
Air Quality
Earthquake History
1,872 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.5.
| Jan 1, 2001 | 21 km SE of Lukatan, Philippines | M7.5 | 100 km | 33 km |
| May 17, 1992 | 23 km ESE of Santiago, Philippines | M7.3 | 76 km | 33 km |
| Aug 11, 2021 | 60 km ENE of Pondaguitan, Philippines | M7.1 | 149 km | 55 km |
| May 17, 1992 | 9 km SE of Santiago, Philippines | M7.1 | 65 km | 33 km |
| Feb 18, 1991 | 18 km E of Aras-asan, Philippines | M7.0 | 121 km | 24 km |
| May 11, 1993 | 3 km E of Manay, Philippines | M7.0 | 65 km | 59 km |
| Mar 11, 1997 | 121 km E of Kinablangan, Philippines | M6.9 | 135 km | 10 km |
| Jan 1, 2001 | Mindanao, Philippines | M6.8 | 138 km | 33 km |
| Nov 13, 1991 | 4 km ESE of Hinatuan, Philippines | M6.8 | 65 km | 36 km |
| Aug 2, 2024 | 20 km E of Barcelona, Philippines | M6.8 | 50 km | 32 km |
| Oct 25, 1990 | 13 km E of Tidman, Philippines | M6.5 | 59 km | 44 km |
| Jan 2, 2001 | 51 km SE of Lukatan, Philippines | M6.4 | 122 km | 33 km |
| Apr 24, 1991 | 50 km ENE of Aras-asan, Philippines | M6.3 | 145 km | 14 km |
| Sep 23, 2016 | 36 km SE of Tamisan, Philippines | M6.3 | 135 km | 65 km |
| Aug 3, 2024 | 44 km E of Barcelona, Philippines | M6.3 | 66 km | 15 km |
| Sep 15, 1997 | 23 km ESE of Barcelona, Philippines | M6.2 | 43 km | 51 km |
| Apr 19, 2022 | 41 km E of Santiago, Philippines | M6.1 | 81 km | 19 km |
| Oct 5, 2000 | 46 km ESE of Jovellar, Philippines | M6.1 | 112 km | 87 km |
| Apr 5, 2018 | 43 km ESE of Tarragona, Philippines | M6.0 | 113 km | 34 km |
| Feb 1, 2023 | 1 km NW of Babag, Philippines | M6.0 | 40 km | 19 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
9 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2021 | Rai | Category 5 | 121 mph | 228 km |
| 2012 | Bopha | Category 5 | 115 mph | 28 km |
| 1995 | Zack | Category 1 | — | 292 km |
| 1994 | Owen | Category 1 | 69 mph | 270 km |
| 1993 | Nell | Category 1 | 69 mph | 163 km |
| 1990 | Mike | Category 5 | 109 mph | 255 km |
| 1986 | Marge | Category 2 | 98 mph | 188 km |
| 1984 | Ike | Category 4 | 104 mph | 188 km |
| 1982 | Nelson | Category 3 | 115 mph | 269 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
7 tsunamis recorded within 500 km. Highest wave on record: 6.0 m (20 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1992 | PHILIPPINES | Earthquake | 6.0 m | — | 76 km |
| 1929 | E. MINDANAO ISLAND | Earthquake | 2.0 m | — | 102 km |
| 2023 | E. MINDANAO ISLAND | Earthquake | 0.3 m | 3 | 83 km |
| 2025 | MINDANAO ISLAND, PHILIPPINES | Earthquake | 0.3 m | 10 | 62 km |
| 1970 | PHILIPPINE TRENCH | Earthquake | 0.1 m | — | 113 km |
| 1924 | E. MINDANAO ISLAND | Eruption + Earthquake | — | — | 143 km |
| 1921 | PHILIPPINE TRENCH | Earthquake | — | — | 68 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Leonard Range (60 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Leonard Range | Stratovolcano | 1,080 m (3,543 ft) | 120 | 60 km |
| Apo | Stratovolcano | 2,938 m (9,639 ft) | Unknown | 155 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 77°F (25°C) | 20.6 in | Coldest, Wettest |
| February | 77°F (25°C) | 14.7 in | |
| March | 78°F (26°C) | 12.1 in | |
| April | 80°F (27°C) | 9.2 in | |
| May | 81°F (27°C) | 8.2 in | Warmest |
| June | 80°F (27°C) | 6.9 in | |
| July | 80°F (27°C) | 5.6 in | |
| August | 80°F (27°C) | 5.0 in | Driest |
| September | 80°F (27°C) | 5.8 in | |
| October | 80°F (27°C) | 7.9 in | |
| November | 79°F (26°C) | 9.3 in | |
| December | 78°F (26°C) | 15.1 in |
San Alfonso has a seasonal temperature swing of 3°F / from 77°F in January to 81°F in May. Total annual precipitation is 120.3 inches, with January being the wettest month (20.6") and August the driest (5.0").