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Weather & Climate in Sili, Samoa
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Sili has a warm climate with an average annual temperature of 76°F (24°C). Winters average 77°F in January while summers reach 74°F in July / relatively mild seasonal variation. The area gets 112 sunny days per year, below the national average of 205. Annual precipitation totals 138.4 inches (wetter than the 38-inch national average). The city sits at an elevation of 115 feet.
Temperature
77°F Jan (25°C)
74°F Jul (24°C)
| Annual Average | 76.0°F |
| 41% above US avg | |
| January Average | 77°F (25°C) |
| July Average | 74°F (24°C) |
| Sunny Days | 112 days/yr |
Geography
| Elevation | 115 ft (35 m) |
| Area | 0.9 sq mi (2.2 km²) |
| Population Density | 1,021/sq mi |
| Coordinates | -13.7560°N, 172.3773°W |
| Timezone | Pacific/Apia |
Precipitation & Snow
Air Quality
Earthquake History
70 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.8.
| Jun 2, 2018 | 141 km SSW of Gataivai, Samoa | M5.8 | 144 km | 10 km |
| Jul 12, 2022 | 141 km SSW of Gataivai, Samoa | M5.7 | 144 km | 10 km |
| Sep 3, 2014 | 141 km SSW of Gataivai, Samoa | M5.7 | 144 km | 10 km |
| Aug 15, 2017 | 137 km SW of Gataivai, Samoa | M5.7 | 141 km | 8 km |
| May 3, 1993 | 97 km SW of Gataivai, Samoa | M5.4 | 100 km | 23 km |
| Sep 29, 2009 | 124 km SSW of Lotofag?, Samoa | M5.2 | 133 km | 10 km |
| Nov 4, 2017 | 145 km NE of Hihifo, Tonga | M5.1 | 150 km | 10 km |
| Jan 18, 2018 | 146 km SSW of Gataivai, Samoa | M5.1 | 149 km | 10 km |
| Aug 3, 1990 | 146 km SW of Gataivai, Samoa | M5.1 | 149 km | 37 km |
| Apr 23, 2009 | 113 km SSW of Lotofag?, Samoa | M5.0 | 128 km | 40 km |
| Sep 15, 2015 | 139 km SSW of Gataivai, Samoa | M5.0 | 143 km | 24 km |
| Feb 6, 2016 | 135 km SSW of Gataivai, Samoa | M5.0 | 138 km | 13 km |
| Sep 17, 2024 | 93 km S of Matavai, Samoa | M4.9 | 141 km | 10 km |
| Oct 3, 1995 | 26 km ENE of Samamea, Samoa | M4.9 | 117 km | 38 km |
| Apr 27, 2024 | 105 km S of Matavai, Samoa | M4.9 | 148 km | 10 km |
| Jul 22, 2016 | 72 km S of Matavai, Samoa | M4.8 | 133 km | 10 km |
| Sep 29, 2009 | Samoa Islands region | M4.8 | 141 km | 10 km |
| Jul 12, 2022 | 141 km SSW of Gataivai, Samoa | M4.8 | 144 km | 10 km |
| Jun 16, 2014 | 144 km NNE of Hihifo, Tonga | M4.8 | 148 km | 24 km |
| Jun 30, 1996 | 137 km SSW of Gataivai, Samoa | M4.8 | 141 km | 33 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
5 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2016 | Amos | Category 2 | 92 mph | 62 km |
| 2005 | Olaf | Category 5 | 132 mph | 163 km |
| 1998 | Ron | Category 4 | 132 mph | 261 km |
| 1992 | Val | Category 4 | 104 mph | 14 km |
| 1987 | Tusi | Category 2 | 81 mph | 275 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 3.6 m (12 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1907 | MATAVANU VOLCANO | Astronomical | 3.6 m | — | 23 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Savai'i (23 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Savai'i | Shield | 1,858 m (6,096 ft) | 1911 | 23 km |
| Upolu | Shield | 1,100 m (3,609 ft) | Unknown | 74 km |
| Tutuila | Tuff cone(s) | 653 m (2,142 ft) | 440 | 191 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 77°F (25°C) | 20.0 in | Wettest |
| February | 77°F (25°C) | 14.7 in | Warmest |
| March | 77°F (25°C) | 13.8 in | |
| April | 77°F (25°C) | 11.3 in | |
| May | 76°F (24°C) | 9.8 in | |
| June | 75°F (24°C) | 6.9 in | |
| July | 74°F (24°C) | 6.0 in | Coldest, Driest |
| August | 74°F (24°C) | 7.1 in | |
| September | 75°F (24°C) | 7.7 in | |
| October | 76°F (24°C) | 12.8 in | |
| November | 76°F (25°C) | 11.4 in | |
| December | 77°F (25°C) | 17.0 in |
Sili has a seasonal temperature swing of 3°F / from 74°F in July to 77°F in February. Total annual precipitation is 138.4 inches, with January being the wettest month (20.0") and July the driest (6.0").