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Weather & Climate in Viengxay, Laos
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Viengxay enjoys a temperate climate with an average annual temperature of 68°F (20°C). Winters average 57°F in January while summers reach 75°F in July / relatively mild seasonal variation. The area gets 276 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 39.4 inches. The city sits at an elevation of 2,172 feet.
Temperature
57°F Jan (14°C)
75°F Jul (24°C)
| Annual Average | 67.9°F |
| 26% above US avg | |
| January Average | 57°F (14°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 276 days/yr |
Geography
| Elevation | 2,172 ft (662 m) |
| Area | 1,611.9 sq mi (4,174.7 km²) |
| Population Density | 0/sq mi |
| Coordinates | 20.3422°N, 104.3446°W |
| Timezone | Asia/Vientiane |
Precipitation & Snow
Air Quality
Earthquake History
13 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.9.
| Jul 27, 2020 | ~120km W of Hanoi, Vietnam | M4.9 | 65 km | 10 km |
| Apr 3, 2003 | 83 km S of Dien Bien Phu, Vietnam | M4.7 | 127 km | 10 km |
| Jul 19, 2014 | 19 km NNE of S?n La, Vietnam | M4.6 | 133 km | 17 km |
| May 2, 2007 | 73 km S of Dien Bien Phu, Vietnam | M4.5 | 133 km | 10 km |
| May 26, 2015 | 73 km ESE of Muang Phônsavan, Laos | M4.5 | 140 km | 13 km |
| Oct 6, 1991 | 33 km E of S?n La, Vietnam | M4.5 | 116 km | 10 km |
| Jun 21, 1995 | 83 km W of Xam Nua, Laos | M4.4 | 114 km | 33 km |
| Mar 14, 2022 | 76 km SSE of Dien Bien Phu, Vietnam | M4.4 | 114 km | 10 km |
| Jun 21, 1995 | 72 km N of Muang Phônsavan, Laos | M4.2 | 118 km | 10 km |
| Mar 25, 2024 | 27 km S of Xuân Mai, Vietnam | M4.2 | 131 km | 10 km |
| May 7, 2011 | 46 km SSW of S?n La, Vietnam | M4.1 | 98 km | 10 km |
| Oct 23, 1993 | 20 km SSW of Yên Bái, Vietnam | M4.1 | 144 km | 33 km |
| Sep 19, 2010 | 71 km SSW of Hòa Bình, Vietnam | M4.0 | 73 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
16 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Kajiki | Category 2 | — | 240 km |
| 2024 | Yagi | Category 3 | 104 mph | 159 km |
| 2017 | Doksuri | Category 2 | 92 mph | 290 km |
| 2016 | Mirinae | Category 1 | 52 mph | 194 km |
| 2014 | Kalmaegi | Category 1 | 63 mph | 270 km |
| 2013 | Wutip | Category 2 | 69 mph | 278 km |
| 2012 | Son-tinh | Category 3 | 81 mph | 235 km |
| 2003 | Krovanh | Category 1 | 58 mph | 295 km |
| 1997 | Zita | Category 1 | 46 mph | 206 km |
| 1996 | Frankie | Category 2 | 58 mph | 162 km |
| 1996 | Niki | Category 1 | 69 mph | 136 km |
| 1995 | Lois | Category 1 | 58 mph | 175 km |
| 1993 | Lewis | Category 1 | 58 mph | 297 km |
| 1989 | Brian | Category 1 | 58 mph | 275 km |
| 1982 | Nancy | Category 1 | 81 mph | 199 km |
| 1980 | Ruth | Category 1 | 63 mph | 251 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 57°F (14°C) | 0.3 in | Coldest, Driest |
| February | 60°F (16°C) | 1.4 in | |
| March | 65°F (19°C) | 1.4 in | |
| April | 71°F (21°C) | 4.3 in | |
| May | 74°F (23°C) | 7.3 in | |
| June | 76°F (24°C) | 8.3 in | Warmest |
| July | 75°F (24°C) | 12.9 in | Wettest |
| August | 75°F (24°C) | 12.0 in | |
| September | 73°F (23°C) | 7.8 in | |
| October | 70°F (21°C) | 3.0 in | |
| November | 64°F (18°C) | 0.9 in | |
| December | 59°F (15°C) | 0.4 in |
Viengxay has a seasonal temperature swing of 19°F / from 57°F in January to 76°F in June. Total annual precipitation is 60.0 inches, with July being the wettest month (12.9") and January the driest (0.3").