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Weather & Climate in Si In, Myanmar
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Si In has a warm climate with an average annual temperature of 76°F (25°C). Winters average 64°F in January while summers reach 82°F in July / relatively mild seasonal variation. The area gets 222 sunny days per year, above the national average. Annual precipitation totals 68.9 inches (wetter than the 38-inch national average). The city sits at an elevation of 384 feet.
Temperature
64°F Jan (18°C)
82°F Jul (28°C)
| Annual Average | 76.1°F |
| 41% above US avg | |
| January Average | 64°F (18°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 222 days/yr |
Geography
| Elevation | 384 ft (117 m) |
| Area | 290.4 sq mi (752.0 km²) |
| Population Density | 8/sq mi |
| Coordinates | 24.2454°N, 97.2922°W |
| Timezone | Asia/Yangon |
Precipitation & Snow
Air Quality
Earthquake History
140 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.3.
| Jun 15, 1992 | 134 km W of Bhamo, Myanmar | M6.3 | 140 km | 17 km |
| Jan 11, 1994 | 25 km SW of Myitkyina, Myanmar | M6.1 | 110 km | 10 km |
| May 30, 2014 | 62 km SE of Myitkyina, Myanmar | M5.9 | 101 km | 10 km |
| May 31, 2023 | 121 km WSW of Myitkyina, Myanmar | M5.9 | 144 km | 10 km |
| Dec 30, 1997 | 79 km W of Myitkyina, Myanmar | M5.8 | 144 km | 33 km |
| May 23, 2014 | 63 km SE of Myitkyina, Myanmar | M5.8 | 98 km | 8 km |
| Mar 10, 2011 | 90 km NE of Bhamo, Myanmar | M5.5 | 86 km | 10 km |
| Jul 26, 1996 | 117 km WSW of Myitkyina, Myanmar | M5.4 | 147 km | 33 km |
| Oct 6, 2000 | 60 km ENE of Bhamo, Myanmar | M5.4 | 55 km | 33 km |
| Jan 5, 1991 | 130 km WSW of Bhamo, Myanmar | M5.2 | 136 km | 32 km |
| Jun 29, 2007 | 82 km W of Myitkyina, Myanmar | M5.2 | 150 km | 53 km |
| Jul 9, 2012 | 87 km W of Myitkyina, Myanmar | M5.1 | 145 km | 31 km |
| Jul 22, 2012 | 106 km WSW of Myitkyina, Myanmar | M5.1 | 121 km | 23 km |
| Mar 21, 2008 | 42 km NE of Bhamo, Myanmar | M5.1 | 40 km | 17 km |
| Jan 1, 2011 | 82 km ENE of Bhamo, Myanmar | M5.0 | 78 km | 21 km |
| Jun 12, 2021 | 68 km SE of Myitkyina, Myanmar | M4.9 | 100 km | 10 km |
| Jan 26, 1991 | 58 km NNW of Bhamo, Myanmar | M4.8 | 62 km | 33 km |
| Sep 20, 1995 | 77 km W of Myitkyina, Myanmar | M4.8 | 145 km | 18 km |
| Feb 19, 2004 | 63 km W of Myitkyina, Myanmar | M4.8 | 146 km | 45 km |
| Aug 3, 2019 | 51 km WSW of Myitkyina, Myanmar | M4.8 | 123 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
2 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.
| Year | Name | Category | Max Wind | Closest |
| 1997 | Unnamed | Category 1 | - | 296 km |
| 1991 | Unnamed | Category 2 | 17 mph | 156 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Nearby Volcanoes
1 volcano within 200 km. Closest: Tengchong (164 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Tengchong | Pyroclastic cone(s) | 2,865 m (9,400 ft) | -5750 | 164 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 64°F (18°C) | 0.3 in | Coldest, Driest |
| February | 68°F (20°C) | 0.5 in | |
| March | 75°F (24°C) | 0.6 in | |
| April | 81°F (27°C) | 1.9 in | |
| May | 83°F (28°C) | 6.3 in | Warmest |
| June | 82°F (28°C) | 13.4 in | |
| July | 82°F (28°C) | 15.2 in | |
| August | 82°F (28°C) | 15.4 in | Wettest |
| September | 82°F (28°C) | 8.1 in | |
| October | 79°F (26°C) | 5.1 in | |
| November | 72°F (22°C) | 1.7 in | |
| December | 65°F (18°C) | 0.6 in |
Si In has a seasonal temperature swing of 19°F / from 64°F in January to 83°F in May. Total annual precipitation is 68.9 inches, with August being the wettest month (15.4") and January the driest (0.3").