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Anao, Guam

Full City Profile

2,385 Population 48/sq mi density
39 ft Elevation 12 meters
80°F Avg Temperature 26°C
Anao has a warm climate with an average annual temperature of 80°F (27°C). Winters average 78°F in January while summers reach 80°F in July. The area gets 181 sunny days per year. Annual precipitation totals 86.3 inches. The area receives 0.0 inches of snow annually.

Temperature

78°F Jan (26°C) 80°F Jul (27°C)
Annual Average79.6°F
47% above US avg
January Average78°F (26°C)
July Average80°F (27°C)
Sunny Days181 days/yr

Geography

Elevation39 ft (12 m)
Area49.5 sq mi (128.2 km²)
Population Density48/sq mi
Coordinates13.5289°N, 144.9182°W
TimezonePacific/Guam

Precipitation & Snow

Annual Rainfall 86.3"
127% above US avg
Snowfall 0.0"
Wettest Month (Aug) 13.43"
Driest Month (Mar) 2.95"

Air Quality

Earthquake History

1,802 earthquakes (M2.5+) within 150 km since 1990. Strongest: M7.8. Most recent: M0.0 on Aug 21, 2025.

Aug 8, 1993 32 km S of Inarajan Village, Guam M7.8 62 km
Apr 26, 2002 20 km SSW of Merizo Village, Guam M7.1 59 km
Oct 12, 2001 69 km SSE of Inarajan Village, Guam M7.0 94 km
Apr 23, 1997 49 km N of Yigo Village, Guam M6.5 51 km
Feb 2, 2005 63 km NNW of Yigo Village, Guam M6.3 65 km
Feb 26, 2000 30 km NNW of Yigo Village, Guam M6.2 33 km
Aug 11, 1993 91 km ESE of Yigo Village, Guam M6.2 88 km
May 9, 1997 8 km SSE of Merizo Village, Guam M6.0 43 km
Aug 16, 1993 41 km SE of Inarajan Village, Guam M6.0 63 km
Feb 10, 1991 54 km NNW of Yigo Village, Guam M6.0 56 km
May 15, 1998 71 km N of Yigo Village, Guam M6.0 72 km
Dec 19, 1999 45 km SSW of Merizo Village, Guam M6.0 82 km
Aug 10, 2025 103 km ESE of Inarajan Village, Guam M5.9 102 km
Jun 29, 2000 29 km SSW of Merizo Village, Guam M5.9 69 km
Jun 21, 2000 64 km N of Yigo Village, Guam M5.9 65 km
Jun 23, 2020 91 km NE of Yigo Village, Guam M5.9 89 km
Feb 12, 2002 50 km N of Yigo Village, Guam M5.8 52 km
Sep 8, 1998 71 km W of Umatac Village, Guam M5.8 103 km
May 28, 2025 63 km SSE of Inarajan Village, Guam M5.8 88 km
Jan 2, 1990 23 km W of Agat Village, Guam M5.8 54 km
Source: USGS (M2.5+, 1990–2025)

Hurricane History

55 hurricanes (Cat 1+) within 500 km since 1980. Strongest: Category 5.

Year Name Category Closest
2023 Mawar Category 5 21 km
2023 Bolaven Category 3 113 km
2019 Wutip Category 5 286 km
2019 Bualoi Category 4 290 km
2018 Yutu Category 5 189 km
2018 Maria Category 4 157 km
2018 Mangkhut Category 3 75 km
2015 In-fa Category 4 287 km
2015 Dolphin Category 4 36 km
2015 Goni Category 3 191 km
2015 Soudelor Category 3 204 km
2014 Vongfong Category 2 102 km
2013 Francisco Category 4 245 km
2009 Nida Category 5 297 km
2007 Kong-rey Category 1 274 km
2005 Nabi Category 2 274 km
2004 Chaba Category 5 121 km
2004 Nock-ten Category 2 257 km
2003 Kujira Category 4 296 km
2002 Pongsona Category 4 31 km
Source: NOAA IBTrACS (Cat 1+, 1980–2026)

Tsunami History

2 tsunamis recorded within 500 km. Highest wave on record: 2.4 m (8 ft).

Year Location Cause Max Wave Deaths Distance
1993 GUAM, MARIANA ISLANDS Earthquake 2.4 m 62 km
1909 GUAM, MARIANA ISLANDS Earthquake 115 km
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Nearby Volcanoes

1 volcano within 200 km. Closest: NW Rota-1 (120 km).

Name Type Elevation Last Eruption Distance
NW Rota-1 Submarine -517 m (-1,696 ft) 2010 120 km
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

Monthly Weather

Month Avg Temperature Precipitation Summary
January 78°F (26°C) 4.3 in
February 78°F (25°C) 3.7 in Coldest
March 79°F (26°C) 3.0 in Driest
April 80°F (27°C) 3.2 in
May 81°F (27°C) 5.1 in
June 81°F (27°C) 5.7 in Warmest
July 80°F (27°C) 9.7 in
August 80°F (27°C) 13.4 in Wettest
September 80°F (27°C) 12.6 in
October 80°F (27°C) 11.8 in
November 80°F (27°C) 8.4 in
December 79°F (26°C) 5.6 in

Anao has a seasonal temperature swing of 3°F / from 78°F in February to 81°F in June. Total annual precipitation is 86.3 inches, with August being the wettest month (13.4") and March the driest (3.0").

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