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Siayan, Philippines

Full City Profile

4,906 Population 28/sq mi density
194 ft Elevation 59 meters
80°F Avg Temperature 27°C
Siayan 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. The area gets 150 sunny days per year. Annual precipitation totals 103.1 inches. The area receives 0.0 inches of snow annually.

Temperature

79°F Jan (26°C) 80°F Jul (27°C)
Annual Average80.3°F
49% above US avg
January Average79°F (26°C)
July Average80°F (27°C)
Sunny Days150 days/yr

Geography

Elevation194 ft (59 m)
Area174.1 sq mi (451.0 km²)
Population Density28/sq mi
Coordinates8.2667°N, 123.1000°W
TimezoneAsia/Manila

Precipitation & Snow

Annual Rainfall 103.1"
171% above US avg
Snowfall 0.0"
Wettest Month (Jun) 13.39"
Driest Month (Feb) 3.07"

Air Quality

Earthquake History

204 earthquakes (M2.5+) within 150 km since 1990. Strongest: M6.0. Most recent: M4.5 on Aug 21, 2025.

Apr 13, 2016 15 km NW of Siocon, Philippines M6.0 130 km
May 23, 1998 6 km WNW of Tabid, Philippines M6.0 70 km
May 13, 1994 6 km SW of Balagon, Philippines M5.9 34 km
Oct 16, 1993 2 km NE of Malim, Philippines M5.8 96 km
Jul 23, 2010 29 km W of Litayan, Philippines M5.8 128 km
Feb 23, 1991 44 km WNW of Kalawit, Philippines M5.7 107 km
Oct 18, 1991 12 km N of Siocon, Philippines M5.6 118 km
Jun 14, 2002 5 km W of Malabang, Philippines M5.6 126 km
Feb 26, 2004 9 km NNW of Josefina, Philippines M5.5 46 km
Jan 7, 2019 27 km NW of Siocon, Philippines M5.5 134 km
Sep 8, 1999 44 km SE of Malim, Philippines M5.5 141 km
Apr 28, 1992 50 km NW of Matangad, Philippines M5.4 129 km
Jun 6, 1995 39 km SE of Malim, Philippines M5.4 135 km
Jan 23, 2025 8 km E of Siocon, Philippines M5.4 117 km
Oct 2, 2012 15 km NNW of Dumingag, Philippines M5.3 21 km
Jun 1, 2018 32 km ESE of Malim, Philippines M5.3 125 km
Oct 1, 2011 30 km ESE of Malim, Philippines M5.3 120 km
Aug 2, 2015 2 km SSW of Lapase, Philippines M5.2 84 km
May 9, 1995 31 km W of Litayan, Philippines M5.1 125 km
Mar 31, 2000 22 km ESE of San Pablo, Philippines M5.1 99 km
Source: USGS (M2.5+, 1990–2025)

Hurricane History

10 hurricanes (Cat 1+) within 500 km since 1980. Strongest: Category 4.

Year Name Category Closest
2025 Kalmaegi Category 2 246 km
2021 Rai Category 4 205 km
2012 Bopha Category 3 85 km
1995 Zack Category 2 282 km
1994 Owen Category 1 253 km
1993 Nell Category 1 262 km
1990 Mike Category 4 260 km
1986 Marge Category 1 253 km
1984 Ike Category 4 211 km
1982 Nelson Category 3 276 km
Source: NOAA IBTrACS (Cat 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 77 km
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Nearby Volcanoes

1 volcano within 200 km. Closest: Cuernos de Negros (110 km).

Name Type Elevation Last Eruption Distance
Cuernos de Negros Complex 1,862 m (6,109 ft) Unknown 110 km
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

Monthly Weather

Month Avg Temperature Precipitation Summary
January 79°F (26°C) 4.0 in Coldest
February 80°F (26°C) 3.1 in Driest
March 81°F (27°C) 3.7 in
April 82°F (28°C) 4.4 in Warmest
May 82°F (28°C) 9.1 in
June 81°F (27°C) 13.4 in Wettest
July 80°F (27°C) 12.2 in
August 80°F (27°C) 11.7 in
September 80°F (27°C) 11.9 in
October 80°F (27°C) 12.1 in
November 80°F (27°C) 11.1 in
December 80°F (27°C) 6.3 in

Siayan has a seasonal temperature swing of 3°F / from 79°F in January to 82°F in April. Total annual precipitation is 103.1 inches, with June being the wettest month (13.4") and February the driest (3.1").

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