Weather & Climate in Siay, Philippines

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Siay has a warm climate with an average annual temperature of 81°F (27°C). Winters average 80°F in January while summers reach 80°F in July / relatively mild seasonal variation. The area gets 157 sunny days per year, below the national average of 205. Annual precipitation totals 100.0 inches (wetter than the 38-inch national average). The city sits at an elevation of 20 feet.

Temperature

80°F Jan (27°C) 80°F Jul (27°C)

Annual Average	80.6°F
	49% above US avg
January Average	80°F (27°C)
July Average	80°F (27°C)
Sunny Days	157 days/yr

Geography

Elevation	20 ft (6 m)
Area	121.1 sq mi (313.6 km²)
Population Density	19/sq mi
Coordinates	7.6961°N, 122.8631°W
Timezone	Asia/Manila

Precipitation & Snow

Annual Rainfall 100.0"

163% above US avg

Snowfall 0.0"

Wettest Month (Jun) 13.74"

Driest Month (Feb) 2.60"

Air Quality

Earthquake History

264 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.6.

Jul 23, 2010	61 km W of Bantogon, Philippines	M7.6	150 km	578 km
Jul 23, 2010	72 km S of Panubigan, Philippines	M7.5	111 km	641 km
Jul 23, 2010	68 km W of Gadung, Philippines	M7.3	124 km	607 km
May 26, 2003	34 km W of Gadung, Philippines	M6.9	140 km	566 km
Jul 29, 2010	89 km W of Bantogon, Philippines	M6.6	134 km	618 km
Oct 4, 2009	71 km W of Gadung, Philippines	M6.6	121 km	620 km
May 23, 1998	6 km WNW of Tabid, Philippines	M6.0	107 km	658 km
Apr 13, 2016	15 km NW of Siocon, Philippines	M6.0	93 km	17 km
May 10, 2018	29 km WNW of Gadung, Philippines	M5.9	135 km	535 km
May 26, 2003	15 km W of Gadung, Philippines	M5.9	149 km	584 km
May 13, 1994	6 km SW of Balagon, Philippines	M5.9	47 km	33 km
Aug 13, 2022	Moro Gulf, Mindanao, Philippines	M5.8	135 km	20 km
Oct 16, 1993	2 km NE of Malim, Philippines	M5.8	69 km	31 km
Jul 23, 2010	29 km W of Litayan, Philippines	M5.8	108 km	602 km
Jul 23, 2010	66 km W of Bantogon, Philippines	M5.8	143 km	612 km
Feb 23, 1991	44 km WNW of Kalawit, Philippines	M5.7	96 km	54 km
Jun 14, 2002	5 km W of Malabang, Philippines	M5.6	128 km	33 km
Oct 4, 2009	55 km WSW of Gadung, Philippines	M5.6	135 km	640 km
Oct 18, 1991	12 km N of Siocon, Philippines	M5.6	82 km	36 km
Dec 2, 1997	51 km W of Gadung, Philippines	M5.5	130 km	596 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Hurricane History

3 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.

Year	Name	Category	Max Wind	Closest
2021	Rai	Category 4	109 mph	270 km
2012	Bopha	Category 3	81 mph	153 km
1984	Ike	Category 4	104 mph	279 km

Source: NOAA IBTrACS (Category 1+, 1980–2026).

Tsunami History

1 tsunami recorded within 500 km. Highest wave on record: 0.0 m (0 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
1978	MINDANAO ISLAND, PHILIPPINES	Earthquake	0.0 m	—	80 km

Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Cuernos de Negros (176 km).

Name	Type	Elevation	Last Eruption	Distance
Cuernos de Negros	Complex	1,862 m (6,109 ft)	Unknown	176 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	80°F (27°C)	2.7 in
February	80°F (27°C)	2.6 in	Coldest, Driest
March	81°F (27°C)	3.6 in
April	82°F (28°C)	5.0 in
May	82°F (28°C)	9.2 in	Warmest
June	81°F (27°C)	13.7 in	Wettest
July	80°F (27°C)	13.2 in
August	80°F (27°C)	12.0 in
September	80°F (27°C)	12.2 in
October	81°F (27°C)	11.9 in
November	81°F (27°C)	9.7 in
December	80°F (27°C)	4.3 in

Siay has a seasonal temperature swing of 2°F / from 80°F in February to 82°F in May. Total annual precipitation is 100.0 inches, with June being the wettest month (13.7") and February the driest (2.6").

View full profile of Siay, Philippines →