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Weather & Climate in Siso, Indonesia
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Siso has a warm climate with an average annual temperature of 78°F (26°C). Winters average 80°F in January while summers reach 75°F in July / relatively mild seasonal variation. The area gets 349 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 46.1 inches (wetter than the 38-inch national average). The city sits at an elevation of 2,064 feet.
Temperature
80°F Jan (27°C)
75°F Jul (24°C)
| Annual Average | 78.4°F |
| 45% above US avg | |
| January Average | 80°F (27°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 349 days/yr |
Geography
| Elevation | 2,064 ft (629 m) |
| Area | 1,646.4 sq mi (4,264.0 km²) |
| Population Density | 0/sq mi |
| Coordinates | -9.8719°N, 124.2209°W |
| Timezone | Asia/Makassar |
Precipitation & Snow
Air Quality
Earthquake History
762 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.4.
| Dec 5, 1995 | 25 km WNW of Atambua, Indonesia | M6.4 | 106 km | 33 km |
| Jan 17, 1997 | 81 km NNW of Naisano Dua, Indonesia | M6.2 | 131 km | 111 km |
| Jun 15, 2015 | 47 km S of Suai, Timor Leste | M5.8 | 114 km | 20 km |
| Jan 15, 2020 | Timor region, Indonesia | M5.7 | 58 km | 10 km |
| Feb 11, 1992 | 16 km SSW of Atambua, Indonesia | M5.7 | 97 km | 27 km |
| Sep 18, 1995 | 74 km WNW of Pante Makasar, Timor Leste | M5.7 | 119 km | 33 km |
| Jan 28, 2009 | 38 km NW of Pante Makasar, Timor Leste | M5.7 | 104 km | 66 km |
| Jul 25, 2023 | 53 km WNW of Pante Makasar, Timor Leste | M5.6 | 98 km | 88 km |
| Mar 3, 2016 | 50 km S of Suai, Timor Leste | M5.6 | 121 km | 30 km |
| Dec 29, 1992 | 41 km NE of Naisano Dua, Indonesia | M5.5 | 69 km | 95 km |
| Jul 18, 2005 | 7 km SW of Soe, Indonesia | M5.5 | 5 km | 10 km |
| Dec 14, 2009 | 16 km NNE of Kupang, Indonesia | M5.5 | 64 km | 46 km |
| Jan 10, 1990 | 25 km ENE of Kupang, Indonesia | M5.5 | 49 km | 33 km |
| Jun 24, 1991 | 45 km SE of Kupang, Indonesia | M5.4 | 70 km | 28 km |
| Oct 31, 1990 | 68 km NW of Pante Makasar, Timor Leste | M5.4 | 129 km | 76 km |
| Jul 18, 2005 | 23 km ESE of Soe, Indonesia | M5.4 | 30 km | 10 km |
| Aug 31, 2023 | 19 km NE of Naisano Dua, Indonesia | M5.4 | 56 km | 47 km |
| Mar 3, 2016 | 13 km SW of Suai, Timor Leste | M5.4 | 118 km | 20 km |
| Nov 18, 2013 | 20 km NE of Kupang, Indonesia | M5.4 | 55 km | 29 km |
| Feb 15, 1995 | 77 km S of Soe, Indonesia | M5.3 | 77 km | 33 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
4 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2017 | Frances | Category 1 | 81 mph | 262 km |
| 1992 | Neville | Category 3 | 81 mph | 294 km |
| 1991 | Marian | Category 1 | 98 mph | 258 km |
| 1981 | Max | Category 1 | 92 mph | 270 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1891 | TIMOR SEA | Earthquake | — | — | 100 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Sirung (152 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Sirung | Complex | 862 m (2,828 ft) | 2015 | 152 km |
| Iliwerung | Complex | 1,018 m (3,340 ft) | 2013 | 165 km |
| Ililabalekan | Stratovolcano | 1,018 m (3,340 ft) | Unknown | 174 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 80°F (27°C) | 11.3 in | Warmest, Wettest |
| February | 76°F (25°C) | 10.3 in | |
| March | 77°F (25°C) | 8.0 in | |
| April | 77°F (25°C) | 3.8 in | |
| May | 76°F (25°C) | 2.3 in | |
| June | 75°F (24°C) | 1.0 in | |
| July | 75°F (24°C) | 0.9 in | |
| August | 74°F (23°C) | 0.3 in | Coldest |
| September | 75°F (24°C) | 0.2 in | Driest |
| October | 78°F (25°C) | 1.2 in | |
| November | 79°F (26°C) | 4.1 in | |
| December | 78°F (26°C) | 9.5 in |
Siso has a seasonal temperature swing of 6°F / from 74°F in August to 80°F in January. Total annual precipitation is 52.9 inches, with January being the wettest month (11.3") and September the driest (0.2").