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Monthly climate in Lang Son, Vietnam

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Lang Son features a humid subtropical climate (Cwa).Temperatures typically range between 15 °C (59 °F) and 28 °C (83 °F) through the year, but rarely can drop to 4 °C (40 °F) or can rise to as high as 37 °C (100 °F).The average annual precipitation amounts to about 1781 mm (70.1 inches) and receives 210 rainy days on the 1 mm (0.04 inches) threshold annually.Lang Son enjoys an average of 2898 hours of sunshine throughout the year, and daylight varies from 10 hours 48 minutes to 13 hours 25 minutes per day.

Monthly average temperatures in Lang Son, Vietnam §

The warmest months in Lang Son are June, July and August, with daily mean temperatures ranging from 27 to 28 °C (81 - 83 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 15 to 16 °C (59 - 61 °F) throughout the day. On average each year, Lang Son experiences 184 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 Lang Son, Vietnam.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 27°C
(80°F)		 28°C
(83°F)		 32°C
(89°F)		 34°C
(93°F)		 35°C
(96°F)		 37°C
(100°F)		 35°C
(96°F)		 35°C
(96°F)		 34°C
(94°F)		 32°C
(90°F)		 30°C
(86°F)		 28°C
(82°F)
Mean maximum 24°C
(76°F)		 26°C
(78°F)		 30°C
(86°F)		 31°C
(88°F)		 33°C
(92°F)		 34°C
(94°F)		 35°C
(94°F)		 35°C
(95°F)		 34°C
(93°F)		 31°C
(88°F)		 29°C
(84°F)		 25°C
(78°F)
Average high 18°C
(65°F)		 19°C
(67°F)		 23°C
(73°F)		 25°C
(78°F)		 29°C
(85°F)		 32°C
(89°F)		 31°C
(89°F)		 31°C
(88°F)		 30°C
(87°F)		 26°C
(79°F)		 23°C
(74°F)		 19°C
(66°F)
Daily mean 15°C
(59°F)		 16°C
(61°F)		 20°C
(68°F)		 22°C
(72°F)		 26°C
(78°F)		 28°C
(83°F)		 28°C
(82°F)		 27°C
(81°F)		 26°C
(80°F)		 23°C
(73°F)		 20°C
(68°F)		 15°C
(60°F)
Average low 12°C
(54°F)		 13°C
(56°F)		 17°C
(63°F)		 19°C
(67°F)		 23°C
(74°F)		 25°C
(78°F)		 25°C
(78°F)		 25°C
(77°F)		 24°C
(75°F)		 20°C
(69°F)		 17°C
(63°F)		 13°C
(55°F)
Mean minimum 6°C
(43°F)		 8°C
(47°F)		 11°C
(53°F)		 13°C
(56°F)		 18°C
(65°F)		 22°C
(73°F)		 24°C
(75°F)		 23°C
(73°F)		 21°C
(71°F)		 16°C
(61°F)		 12°C
(54°F)		 7°C
(44°F)
Minimum 4°C
(40°F)		 5°C
(41°F)		 9°C
(48°F)		 10°C
(50°F)		 15°C
(60°F)		 20°C
(69°F)		 23°C
(73°F)		 22°C
(72°F)		 19°C
(67°F)		 15°C
(59°F)		 9°C
(48°F)		 4°C
(40°F)

Compare climate in Lang Son with other places

Compare temperature, precipitation, sunshine, UV index in Lang Son, Vietnam with other places around the world.

Monthly average precipitation in Lang Son, Vietnam §

Lang Son usually has the most precipitation in June, July and August, with an average of 24 rainy days and 274 mm (10.8 inches) of precipitation per month.The driest months in Lang Son are January, November and December. On average, 48 mm (1.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Lang Son, Vietnam.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) 55 (2.2) 57 (2.2) 92 (3.6) 117 (4.6) 179 (7.1) 235 (9.2) 243 (9.6) 346 (13.6) 198 (7.8) 170 (6.7) 39 (1.6) 51 (2.0)
Average precipitation days (≥ 1 mm) 11 11 21 18 22 21 23 28 22 15 9 9

Monthly sunshine hours in Lang Son, Vietnam §

The sunniest months in Lang Son are May, June and July, when the sun shines an average of 9 hours 31 minutes a day.Least sunny months in Lang Son: January, February and March receive an average of 5 hours 45 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Lang Son, Vietnam.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 151 200 172 216 296 288 291 265 285 252 245 233
Mean daily daylight hours 10h 57m 11h 24m 12h 1m 12h 38m 13h 10m 13h 25m 13h 18m 12h 50m 12h 14m 11h 37m 11h 5m 10h 48m

Solar UV radiation in Lang Son, Vietnam §

Lang Son experiences the highest level of ultraviolet (UV) radiation in April, August and September, when the maximum UV index can reach values of 13 - 14, which corresponds to the Extreme category of sun exposure.January, November and December are in the High / 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 Lang Son UV Index data.

Average daily maximum UV levels by month for Lang Son, Vietnam.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) 8 10 12 13 13 13 13 14 13 11 9 7