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Monthly climate in Vientiane, Laos

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Vientiane features a tropical savanna climate (Aw).Temperatures typically range between 23 °C (74 °F) and 29 °C (85 °F) through the year, but rarely can drop to 9 °C (48 °F) or can rise to as high as 42 °C (107 °F).The average annual precipitation amounts to about 1790 mm (70.5 inches) and receives 160 rainy days on the 1 mm (0.04 inches) threshold annually.Vientiane enjoys an average of 3457 hours of sunshine throughout the year, and daylight varies from 11 hours 3 minutes to 13 hours 10 minutes per day.

Monthly average temperatures in Vientiane, Laos §

The warmest months in Vientiane are April, May and June, with daily mean temperatures ranging from 29 to 29 °C (85 - 85 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 23 to 25 °C (74 - 76 °F) throughout the day. On average each year, Vientiane experiences 324 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Vientiane, Laos.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 35°C
(95°F)		 38°C
(100°F)		 40°C
(104°F)		 42°C
(107°F)		 41°C
(107°F)		 39°C
(102°F)		 37°C
(99°F)		 37°C
(98°F)		 37°C
(98°F)		 36°C
(98°F)		 36°C
(98°F)		 35°C
(95°F)
Mean maximum 34°C
(93°F)		 37°C
(99°F)		 39°C
(102°F)		 40°C
(104°F)		 38°C
(101°F)		 36°C
(97°F)		 36°C
(97°F)		 36°C
(97°F)		 36°C
(97°F)		 35°C
(95°F)		 35°C
(95°F)		 33°C
(91°F)
Average high 30°C
(86°F)		 32°C
(89°F)		 35°C
(94°F)		 35°C
(95°F)		 34°C
(94°F)		 33°C
(92°F)		 32°C
(91°F)		 32°C
(90°F)		 33°C
(91°F)		 32°C
(90°F)		 32°C
(89°F)		 30°C
(85°F)
Daily mean 24°C
(75°F)		 25°C
(76°F)		 28°C
(82°F)		 29°C
(85°F)		 29°C
(85°F)		 29°C
(85°F)		 29°C
(84°F)		 28°C
(83°F)		 28°C
(83°F)		 28°C
(82°F)		 26°C
(79°F)		 23°C
(74°F)
Average low 18°C
(65°F)		 19°C
(66°F)		 22°C
(73°F)		 24°C
(76°F)		 26°C
(78°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(79°F)		 25°C
(78°F)		 24°C
(76°F)		 22°C
(71°F)		 18°C
(64°F)
Mean minimum 14°C
(57°F)		 15°C
(59°F)		 19°C
(66°F)		 21°C
(70°F)		 23°C
(74°F)		 24°C
(76°F)		 25°C
(77°F)		 24°C
(76°F)		 24°C
(75°F)		 21°C
(71°F)		 18°C
(64°F)		 12°C
(54°F)
Minimum 10°C
(51°F)		 13°C
(55°F)		 17°C
(63°F)		 17°C
(63°F)		 22°C
(71°F)		 24°C
(75°F)		 25°C
(76°F)		 24°C
(75°F)		 23°C
(73°F)		 20°C
(68°F)		 17°C
(63°F)		 9°C
(48°F)

Compare climate in Vientiane with other places

Compare temperature, precipitation, sunshine, UV index in Vientiane, Laos with other places around the world.

Monthly average precipitation in Vientiane, Laos §

Vientiane usually has the most precipitation in June, July and August, with an average of 25 rainy days and 347 mm (13.7 inches) of precipitation per month.The driest months in Vientiane are January, November and December. On average, 8 mm (0.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Vientiane, Laos.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 6 (0.2) 17 (0.7) 41 (1.6) 70 (2.8) 204 (8.0) 309 (12.2) 331 (13.0) 402 (15.8) 265 (10.4) 129 (5.1) 10 (0.4) 7 (0.3)
Average precipitation days (≥ 1 mm) 1 1 6 11 21 25 26 26 24 15 3 1

Monthly sunshine hours in Vientiane, Laos §

The sunniest months in Vientiane are March, April and December, when the sun shines an average of 10 hours 12 minutes a day.Least sunny months in Vientiane: January, July and August receive an average of 8 hours 17 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Vientiane, Laos.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 252 292 318 309 308 271 269 249 274 295 305 311
Mean daily daylight hours 11h 10m 11h 32m 12h 2m 12h 32m 12h 57m 13h 10m 13h 4m 12h 41m 12h 12m 11h 42m 11h 16m 11h 3m

Solar UV radiation in Vientiane, Laos §

Vientiane experiences the highest level of ultraviolet (UV) radiation in April, August and September, when the maximum UV index can reach values of 14 - 14, which corresponds to the Extreme category of sun exposure.January, November and December are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 9. For more detailed information, check out our hourly Vientiane UV Index data.

Average daily maximum UV levels by month for Vientiane, Laos.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 9 11 13 14 14 13 14 14 14 12 9 8