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Weather & Climate in Poso, Indonesia
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Poso has a warm climate with an average annual temperature of 80°F (27°C). Winters average 80°F in January while summers reach 79°F in July / relatively mild seasonal variation. The area gets 171 sunny days per year. Annual precipitation totals 90.7 inches (wetter than the 38-inch national average). The city sits at an elevation of 33 feet.
Temperature
80°F Jan (27°C)
79°F Jul (26°C)
| Annual Average | 80.0°F |
| 48% above US avg | |
| January Average | 80°F (27°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 171 days/yr |
Geography
| Elevation | 33 ft (10 m) |
| Area | 3,039.3 sq mi (7,871.7 km²) |
| Population Density | 16/sq mi |
| Coordinates | -1.3959°N, 120.7524°W |
| Timezone | Asia/Makassar |
Precipitation & Snow
Air Quality
Earthquake History
419 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.6.
| May 29, 2017 | 37 km WNW of Poso, Indonesia | M6.6 | 38 km | 12 km |
| Jul 26, 2021 | 99 km WNW of Luwuk, Indonesia | M6.3 | 146 km | 11 km |
| Aug 18, 2012 | 51 km SSE of Palu, Indonesia | M6.3 | 74 km | 10 km |
| Jan 23, 2005 | 32 km SSE of Palu, Indonesia | M6.3 | 94 km | 11 km |
| Aug 15, 2002 | 68 km ENE of Poso, Indonesia | M6.2 | 68 km | 10 km |
| Feb 15, 2011 | 146 km SSE of Poso, Indonesia | M6.1 | 147 km | 16 km |
| Oct 10, 1998 | 55 km N of Palu, Indonesia | M6.0 | 150 km | 33 km |
| May 19, 1995 | 49 km NNW of Poso, Indonesia | M5.9 | 50 km | 26 km |
| Mar 28, 2020 | 73 km WSW of Poso, Indonesia | M5.9 | 73 km | 10 km |
| Jul 9, 2005 | 31 km SSE of Palu, Indonesia | M5.9 | 91 km | 32 km |
| Aug 16, 2025 | 13 km NNW of Poso, Indonesia | M5.8 | 14 km | 8 km |
| Aug 26, 2021 | 106 km NE of Poso, Indonesia | M5.7 | 106 km | 8 km |
| Nov 25, 1999 | 95 km ENE of Poso, Indonesia | M5.7 | 96 km | 33 km |
| Jan 3, 1993 | 70 km SSW of Palu, Indonesia | M5.7 | 120 km | 37 km |
| Mar 2, 2009 | 21 km S of Palu, Indonesia | M5.6 | 104 km | 11 km |
| Jul 24, 2025 | 69 km NNE of Masamba, Indonesia | M5.6 | 71 km | 10 km |
| Dec 10, 2000 | 107 km NE of Poso, Indonesia | M5.5 | 108 km | 33 km |
| May 13, 1999 | 132 km NE of Poso, Indonesia | M5.5 | 133 km | 35 km |
| Jul 24, 2025 | 64 km S of Poso, Indonesia | M5.5 | 65 km | 10 km |
| Feb 27, 2023 | 60 km WSW of Poso, Indonesia | M5.5 | 61 km | 39 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 15.0 m (49 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1927 | SULAWESI | Earthquake | 15.0 m | 50 | 57 km |
| 2025 | SULAWESI | Earthquake | 0.0 m | 2 | 13 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 80°F (27°C) | 6.3 in | |
| February | 80°F (26°C) | 6.4 in | |
| March | 80°F (27°C) | 8.5 in | |
| April | 80°F (27°C) | 10.7 in | |
| May | 80°F (27°C) | 10.9 in | Wettest |
| June | 80°F (27°C) | 9.1 in | |
| July | 79°F (26°C) | 7.7 in | Coldest |
| August | 80°F (27°C) | 6.1 in | |
| September | 80°F (27°C) | 5.8 in | |
| October | 81°F (27°C) | 5.2 in | Warmest, Driest |
| November | 80°F (27°C) | 7.2 in | |
| December | 80°F (27°C) | 6.8 in |
Poso has a seasonal temperature swing of 1°F / from 79°F in July to 81°F in October. Total annual precipitation is 90.7 inches, with May being the wettest month (10.9") and October the driest (5.2").