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Monthly climate in Viengxay, Laos

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Viengxay features a humid subtropical climate (Cwa). Temperatures typically range between 15 °C (58 °F) and 25 °C (77 °F) through the year, but rarely can drop to 2 °C (36 °F) or can rise to as high as 35 °C (96 °F). The average annual precipitation amounts to about 1717 mm (67.6 inches) and receives 202 rainy days on the 1 mm (0.04 inches) threshold annually. Viengxay enjoys an average of 3070 hours of sunshine throughout the year, and daylight varies from 10 hours 54 minutes to 13 hours 19 minutes per day.

Monthly average temperatures in Viengxay, Laos

The warmest months in Viengxay are June, July and August, with daily mean temperatures ranging from 24 to 25 °C (75 - 77 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 15 to 16 °C (58 - 61 °F) throughout the day. On average each year, Viengxay experiences 189 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 Viengxay. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum28°C
(83°F)		31°C
(87°F)		32°C
(89°F)		35°C
(95°F)		35°C
(96°F)		35°C
(96°F)		32°C
(91°F)		32°C
(91°F)		31°C
(88°F)		31°C
(88°F)		30°C
(86°F)		28°C
(82°F)
Mean maximum26°C
(80°F)		29°C
(84°F)		31°C
(88°F)		32°C
(90°F)		33°C
(91°F)		32°C
(90°F)		32°C
(90°F)		32°C
(89°F)		31°C
(88°F)		29°C
(85°F)		28°C
(83°F)		26°C
(79°F)
Average high20°C
(68°F)		22°C
(71°F)		26°C
(78°F)		26°C
(80°F)		28°C
(84°F)		30°C
(86°F)		28°C
(83°F)		28°C
(83°F)		27°C
(81°F)		24°C
(75°F)		22°C
(72°F)		19°C
(67°F)
Daily mean15°C
(59°F)		16°C
(61°F)		20°C
(68°F)		21°C
(70°F)		23°C
(74°F)		25°C
(77°F)		24°C
(76°F)		24°C
(75°F)		23°C
(74°F)		20°C
(69°F)		18°C
(65°F)		15°C
(58°F)
Average low12°C
(53°F)		12°C
(54°F)		16°C
(60°F)		17°C
(63°F)		20°C
(68°F)		22°C
(72°F)		22°C
(71°F)		21°C
(70°F)		20°C
(68°F)		18°C
(64°F)		15°C
(59°F)		11°C
(52°F)
Mean minimum6°C
(44°F)		7°C
(45°F)		12°C
(53°F)		13°C
(55°F)		16°C
(62°F)		20°C
(69°F)		20°C
(69°F)		20°C
(68°F)		18°C
(64°F)		13°C
(56°F)		10°C
(51°F)		5°C
(42°F)
Minimum4°C
(39°F)		4°C
(40°F)		10°C
(50°F)		9°C
(49°F)		14°C
(58°F)		20°C
(68°F)		20°C
(68°F)		19°C
(67°F)		16°C
(60°F)		12°C
(53°F)		8°C
(47°F)		2°C
(36°F)

Compare climate in Viengxay with other places

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

Monthly average precipitation in Viengxay, Laos

Viengxay usually has the most precipitation in May, July and August, with an average of 26 rainy days and 285 mm (11.2 inches) of precipitation per month. The driest months in Viengxay are January, February and December. On average, 30 mm (1.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Viengxay. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)29 (1.1)30 (1.2)76 (3.0)143 (5.6)208 (8.2)176 (6.9)290 (11.4)357 (14.1)173 (6.8)165 (6.5)40 (1.6)30 (1.2)
Average precipitation days (≥ 1 mm)66131925222627231997

Monthly sunshine hours in Viengxay, Laos

The sunniest months in Viengxay are March, May and June, when the sun shines an average of 9 hours 14 minutes a day. Least sunny months in Viengxay: January, October and November receive an average of 7 hours 16 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Viengxay. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours188245275247299276273261271236244251
Mean daily daylight hours11h 2m11h 27m12h 1m12h 36m13h 5m13h 19m13h 12m12h 47m12h 13m11h 39m11h 9m10h 54m

Solar UV radiation in Viengxay, Laos

Viengxay experiences the highest level of ultraviolet (UV) radiation in July, August and September, when the maximum UV index can reach values of 14 - 15, 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 10. For more detailed information, check out our hourly Viengxay UV Index data.

Average daily maximum UV levels by month for Viengxay. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)9111313141415141412108