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Weather & Climate in Osiao, Philippines
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Osiao has a warm climate with an average annual temperature of 78°F (25°C). Winters average 75°F in January while summers reach 79°F in July / relatively mild seasonal variation. The area gets 124 sunny days per year, below the national average of 205. Annual precipitation totals 131.9 inches (wetter than the 38-inch national average). The city sits at an elevation of 33 feet.
Temperature
75°F Jan (24°C)
79°F Jul (26°C)
| Annual Average | 77.5°F |
| 44% above US avg | |
| January Average | 75°F (24°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 124 days/yr |
Geography
| Elevation | 33 ft (10 m) |
| Area | 310.4 sq mi (803.8 km²) |
| Population Density | 9/sq mi |
| Coordinates | 13.0914°N, 123.9811°W |
| Timezone | Asia/Manila |
Precipitation & Snow
Air Quality
Earthquake History
539 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.1.
| Jun 11, 1996 | 8 km NNE of Palapag, Philippines | M7.1 | 138 km | 33 km |
| Oct 12, 1994 | 15 km E of Gigmoto, Philippines | M6.4 | 96 km | 16 km |
| Feb 15, 2003 | 11 km SSW of San Vicente, Philippines | M6.3 | 103 km | 10 km |
| Jun 9, 1994 | 18 km ENE of Rapu-Rapu, Philippines | M6.2 | 37 km | 76 km |
| May 5, 1995 | 12 km N of Cabatuan, Philippines | M6.1 | 145 km | 33 km |
| Feb 15, 2023 | 9 km NNE of Miaga, Philippines | M6.1 | 88 km | 8 km |
| Jun 14, 1996 | 16 km N of Cabodiongan, Philippines | M6.1 | 121 km | 29 km |
| Jun 26, 2003 | 4 km ENE of Miaga, Philippines | M6.0 | 94 km | 10 km |
| Jul 1, 2003 | 22 km NW of Cabodiongan, Philippines | M6.0 | 104 km | 33 km |
| Oct 12, 1994 | 16 km E of Gigmoto, Philippines | M5.9 | 96 km | 27 km |
| Nov 5, 1998 | 22 km N of Cabodiongan, Philippines | M5.9 | 117 km | 33 km |
| Jul 12, 1995 | 3 km ESE of Las Navas, Philippines | M5.9 | 145 km | 34 km |
| Oct 1, 2024 | 62 km NE of Gigmoto, Philippines | M5.9 | 150 km | 10 km |
| Apr 18, 1996 | 18 km NNW of Cabodiongan, Philippines | M5.8 | 113 km | 33 km |
| Feb 22, 2005 | 17 km W of Tigbao, Philippines | M5.8 | 104 km | 18 km |
| Feb 15, 2003 | 2 km N of Palanas, Philippines | M5.8 | 103 km | 10 km |
| Jul 7, 1993 | 2 km SSE of Maagnas, Philippines | M5.7 | 75 km | 40 km |
| Apr 10, 2017 | 54 km NE of Cabodiongan, Philippines | M5.7 | 150 km | 10 km |
| Aug 19, 2024 | 21 km NNW of Bugko, Philippines | M5.7 | 92 km | 48 km |
| Dec 12, 1993 | 3 km SSW of Mambulo, Philippines | M5.6 | 122 km | 22 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
86 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Fung-wong | Category 4 | - | 134 km |
| 2025 | Kalmaegi | Category 2 | - | 226 km |
| 2024 | Man-yi | Category 5 | 121 mph | 112 km |
| 2024 | Ewiniar | Category 2 | 81 mph | 278 km |
| 2024 | Toraji | Category 1 | 75 mph | 272 km |
| 2022 | Noru | Category 5 | 109 mph | 216 km |
| 2021 | Surigae | Category 4 | 121 mph | 279 km |
| 2021 | Conson | Category 1 | - | 251 km |
| 2020 | Goni | Category 5 | 138 mph | 61 km |
| 2020 | Vamco | Category 3 | 86 mph | 165 km |
| 2020 | Vongfong | Category 3 | 98 mph | 67 km |
| 2020 | Molave | Category 1 | 81 mph | 37 km |
| 2019 | Kammuri | Category 4 | 104 mph | 16 km |
| 2019 | Phanfone | Category 3 | 92 mph | 166 km |
| 2016 | Nock-ten | Category 5 | 121 mph | 46 km |
| 2016 | Sarika | Category 4 | 109 mph | 146 km |
| 2015 | Melor | Category 4 | 109 mph | 44 km |
| 2015 | Noul | Category 4 | 104 mph | 240 km |
| 2015 | Koppu | Category 3 | 104 mph | 295 km |
| 2015 | Mekkhala | Category 1 | 69 mph | 238 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
3 tsunamis recorded within 500 km. Highest wave on record: 1.3 m (4 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1973 | QUEZON | Earthquake | 1.3 m | 15 | 132 km |
| 2003 | SAMAR SEA | Eruption + Earthquake | 1.0 m | - | 103 km |
| 1925 | PHILIPPINE SEA | Earthquake | - | - | 111 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Pocdol Mountains (5 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Pocdol Mountains | Compound | 1,102 m (3,615 ft) | Unknown | 5 km |
| Bulusan | Stratovolcano(es) | 1,535 m (5,036 ft) | 2017 | 37 km |
| Isarog | Stratovolcano | 1,966 m (6,450 ft) | -3500 | 91 km |
| Biliran | Compound | 1,301 m (4,268 ft) | 1939 | 185 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 75°F (24°C) | 13.7 in | Coldest |
| February | 75°F (24°C) | 8.1 in | |
| March | 76°F (25°C) | 7.2 in | |
| April | 78°F (26°C) | 5.9 in | Driest |
| May | 80°F (26°C) | 6.9 in | Warmest |
| June | 80°F (26°C) | 8.7 in | |
| July | 79°F (26°C) | 10.0 in | |
| August | 79°F (26°C) | 8.9 in | |
| September | 79°F (26°C) | 10.2 in | |
| October | 78°F (26°C) | 14.5 in | |
| November | 77°F (25°C) | 18.0 in | |
| December | 76°F (24°C) | 19.7 in | Wettest |
Osiao has a seasonal temperature swing of 5°F / from 75°F in January to 80°F in May. Total annual precipitation is 131.9 inches, with December being the wettest month (19.7") and April the driest (5.9").