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Monthly climate in Ha Long, Vietnam

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Ha Long features a humid subtropical climate (Cwa).Temperatures typically range between 18 °C (64 °F) and 30 °C (86 °F) through the year, but rarely can drop to 7 °C (45 °F) or can rise to as high as 38 °C (100 °F).The average annual precipitation amounts to about 1973 mm (77.7 inches) and receives 187 rainy days on the 1 mm (0.04 inches) threshold annually.Ha Long enjoys an average of 3041 hours of sunshine throughout the year, and daylight varies from 10 hours 52 minutes to 13 hours 22 minutes per day.

Monthly average temperatures in Ha Long, Vietnam §

The warmest months in Ha Long are June, July and August, with daily mean temperatures ranging from 28 to 30 °C (83 - 86 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 18 to 18 °C (64 - 66 °F) throughout the day. On average each year, Ha Long experiences 206 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 Ha Long, 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 26°C
(80°F)		 27°C
(80°F)		 31°C
(88°F)		 33°C
(91°F)		 36°C
(98°F)		 38°C
(100°F)		 36°C
(98°F)		 36°C
(97°F)		 35°C
(95°F)		 34°C
(94°F)		 30°C
(86°F)		 28°C
(82°F)
Mean maximum 24°C
(76°F)		 25°C
(77°F)		 28°C
(84°F)		 30°C
(87°F)		 34°C
(94°F)		 35°C
(96°F)		 35°C
(96°F)		 35°C
(95°F)		 34°C
(94°F)		 33°C
(91°F)		 29°C
(85°F)		 27°C
(80°F)
Average high 20°C
(68°F)		 21°C
(69°F)		 23°C
(75°F)		 26°C
(80°F)		 30°C
(86°F)		 32°C
(91°F)		 32°C
(90°F)		 31°C
(89°F)		 31°C
(88°F)		 28°C
(83°F)		 25°C
(78°F)		 21°C
(71°F)
Daily mean 18°C
(64°F)		 18°C
(65°F)		 21°C
(71°F)		 24°C
(75°F)		 27°C
(81°F)		 30°C
(86°F)		 29°C
(85°F)		 28°C
(83°F)		 28°C
(83°F)		 25°C
(77°F)		 22°C
(73°F)		 18°C
(66°F)
Average low 16°C
(60°F)		 16°C
(61°F)		 20°C
(68°F)		 22°C
(71°F)		 25°C
(78°F)		 28°C
(82°F)		 27°C
(81°F)		 26°C
(80°F)		 26°C
(78°F)		 23°C
(73°F)		 20°C
(68°F)		 16°C
(61°F)
Mean minimum 10°C
(50°F)		 11°C
(53°F)		 15°C
(60°F)		 17°C
(63°F)		 21°C
(71°F)		 25°C
(77°F)		 25°C
(78°F)		 24°C
(76°F)		 24°C
(75°F)		 19°C
(66°F)		 15°C
(60°F)		 10°C
(51°F)
Minimum 8°C
(46°F)		 7°C
(45°F)		 14°C
(57°F)		 14°C
(58°F)		 19°C
(66°F)		 23°C
(74°F)		 25°C
(77°F)		 24°C
(76°F)		 22°C
(72°F)		 17°C
(63°F)		 12°C
(54°F)		 8°C
(46°F)

Compare climate in Ha Long with other places

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

Monthly average precipitation in Ha Long, Vietnam §

Ha Long usually has the most precipitation in July, August and September, with an average of 25 rainy days and 355 mm (14.0 inches) of precipitation per month.The driest months in Ha Long are January, February and December. On average, 32 mm (1.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ha Long, 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) 28 (1.1) 36 (1.4) 52 (2.0) 91 (3.6) 184 (7.2) 240 (9.4) 287 (11.3) 521 (20.5) 256 (10.1) 204 (8.0) 43 (1.7) 31 (1.2)
Average precipitation days (≥ 1 mm) 5 7 15 15 19 20 24 28 23 16 9 6

Monthly sunshine hours in Ha Long, Vietnam §

The sunniest months in Ha Long are May, June and July, when the sun shines an average of 9 hours 49 minutes a day.Least sunny months in Ha Long: January, February and March receive an average of 6 hours 27 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ha Long, 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 169 216 200 248 306 297 299 266 286 259 252 238
Mean daily daylight hours 10h 59m 11h 26m 12h 1m 12h 37m 13h 7m 13h 22m 13h 15m 12h 48m 12h 14m 11h 38m 11h 7m 10h 52m

Solar UV radiation in Ha Long, Vietnam §

Ha Long experiences the highest level of ultraviolet (UV) radiation in April, August and September, when the maximum UV index can reach values of 13 - 13, 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 Ha Long UV Index data.

Average daily maximum UV levels by month for Ha Long, 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 12 13 13 13 11 9 7