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Weather & Climate in Ondong Siau, Indonesia
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ondong Siau has a warm climate with an average annual temperature of 77°F (25°C). Winters average 82°F in January while summers reach 77°F in July / relatively mild seasonal variation. The area gets 336 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 87.2 inches (wetter than the 38-inch national average). The city sits at an elevation of 20 feet.
Temperature
82°F Jan (28°C)
77°F Jul (25°C)
| Annual Average | 76.5°F |
| 42% above US avg | |
| January Average | 82°F (28°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 336 days/yr |
Geography
| Elevation | 20 ft (6 m) |
| Area | 0.6 sq mi (1.5 km²) |
| Population Density | 0/sq mi |
| Coordinates | 2.7473°N, 125.3611°W |
| Timezone | Asia/Makassar |
Precipitation & Snow
Air Quality
Earthquake History
1,015 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.4.
| Feb 28, 1996 | 123 km ENE of Laikit, Laikit II (Dimembe), Indonesia | M6.4 | 134 km | 116 km |
| Jun 13, 2011 | 193 km WNW of Tobelo, Indonesia | M6.3 | 124 km | 61 km |
| Jul 10, 2021 | 215 km NW of Tobelo, Indonesia | M6.1 | 128 km | 44 km |
| Feb 20, 1994 | 172 km NW of Ternate, Indonesia | M6.0 | 146 km | 28 km |
| Mar 12, 1996 | 208 km NW of Tobelo, Indonesia | M5.9 | 132 km | 29 km |
| Apr 2, 1996 | 227 km NE of Laikit, Laikit II (Dimembe), Indonesia | M5.9 | 109 km | 41 km |
| Apr 7, 2005 | 218 km NW of Tobelo, Indonesia | M5.9 | 127 km | 60 km |
| Jul 9, 2005 | 199 km NW of Tobelo, Indonesia | M5.9 | 130 km | 22 km |
| Mar 4, 2005 | 206 km NE of Laikit, Laikit II (Dimembe), Indonesia | M5.9 | 117 km | 59 km |
| Mar 4, 1996 | 146 km N of Laikit, Laikit II (Dimembe), Indonesia | M5.9 | 22 km | 151 km |
| Jun 23, 2001 | 79 km E of Laikit, Laikit II (Dimembe), Indonesia | M5.7 | 150 km | 70 km |
| Sep 9, 2009 | 153 km NE of Laikit, Laikit II (Dimembe), Indonesia | M5.7 | 82 km | 107 km |
| Feb 7, 2002 | 224 km NE of Laikit, Laikit II (Dimembe), Indonesia | M5.7 | 108 km | 33 km |
| Jun 26, 2005 | 99 km ENE of Laikit, Laikit II (Dimembe), Indonesia | M5.7 | 120 km | 92 km |
| Dec 24, 1992 | 182 km WNW of Tobelo, Indonesia | M5.7 | 137 km | 97 km |
| Jan 16, 2007 | 187 km NE of Laikit, Laikit II (Dimembe), Indonesia | M5.6 | 99 km | 64 km |
| Jan 18, 2001 | 188 km NE of Laikit, Laikit II (Dimembe), Indonesia | M5.6 | 113 km | 38 km |
| Jun 12, 1992 | 147 km NNE of Laikit, Laikit II (Dimembe), Indonesia | M5.6 | 39 km | 79 km |
| Apr 4, 1996 | 225 km NE of Laikit, Laikit II (Dimembe), Indonesia | M5.6 | 103 km | 33 km |
| Mar 29, 2016 | 160 km NE of Laikit, Laikit II (Dimembe), Indonesia | M5.5 | 92 km | 55 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
4 tsunamis recorded within 500 km. Highest wave on record: 25.0 m (82 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1871 | RUANG | Astronomical | 25.0 m | 400 | 52 km |
| 1892 | AWU VOLCANO, SANGIHE ISLAND | Astronomical | 0.8 m | 1,532 | 104 km |
| 1856 | SANGIHE ISLAND | Astronomical | — | 2,806 | 104 km |
| 1845 | CELEBES SEA | Earthquake | — | 118 | 150 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
6 volcanoes within 200 km. Closest: Tangkoko-Duasudara (138 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Tangkoko-Duasudara | Stratovolcano | 1,334 m (4,377 ft) | 1880 | 138 km |
| Klabat | Stratovolcano | 1,968 m (6,457 ft) | Unknown | 148 km |
| Mahawu | Stratovolcano | 1,299 m (4,262 ft) | 1977 | 165 km |
| Lokon-Empung | Stratovolcano(es) | 1,580 m (5,184 ft) | 2015 | 167 km |
| Tondano Caldera | Caldera | 1,202 m (3,944 ft) | Unknown | 179 km |
| Soputan | Stratovolcano | 1,785 m (5,856 ft) | 2020 | 195 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 82°F (28°C) | 11.3 in | Warmest, Wettest |
| February | 76°F (24°C) | 9.6 in | Coldest |
| March | 76°F (25°C) | 9.0 in | |
| April | 77°F (25°C) | 9.1 in | |
| May | 77°F (25°C) | 9.5 in | |
| June | 77°F (25°C) | 8.2 in | |
| July | 77°F (25°C) | 6.1 in | |
| August | 77°F (25°C) | 4.8 in | Driest |
| September | 77°F (25°C) | 5.9 in | |
| October | 77°F (25°C) | 7.6 in | |
| November | 77°F (25°C) | 10.0 in | |
| December | 76°F (25°C) | 10.6 in |
Ondong Siau has a seasonal temperature swing of 6°F / from 76°F in February to 82°F in January. Total annual precipitation is 101.7 inches, with January being the wettest month (11.3") and August the driest (4.8").