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Monthly climate in Haikou, China

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Haikou features a humid subtropical climate (Cfa). Temperatures typically range between 8 °C (46 °F) and 28 °C (82 °F) through the year, but rarely can drop to -5 °C (22 °F) or can rise to as high as 39 °C (103 °F). The average annual precipitation amounts to about 1469 mm (57.8 inches) and receives 149 rainy days on the 1 mm (0.04 inches) threshold annually. Haikou enjoys an average of 2666 hours of sunshine throughout the year, and daylight varies from 10 hours 21 minutes to 13 hours 54 minutes per day.

Monthly average temperatures in Haikou, China

The warmest months in Haikou are July, August and September, with daily mean temperatures ranging from 25 to 28 °C (77 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 8 to 9 °C (46 - 48 °F) throughout the day. On average each year, Haikou experiences 139 days above 25 °C (77.0 °F) and 9 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Haikou. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum26°C
(79°F)		28°C
(82°F)		31°C
(88°F)		33°C
(92°F)		39°C
(103°F)		37°C
(99°F)		37°C
(100°F)		38°C
(100°F)		37°C
(99°F)		35°C
(96°F)		31°C
(88°F)		28°C
(83°F)
Mean maximum22°C
(71°F)		24°C
(75°F)		28°C
(83°F)		31°C
(89°F)		35°C
(95°F)		34°C
(93°F)		37°C
(99°F)		36°C
(98°F)		35°C
(96°F)		32°C
(90°F)		26°C
(79°F)		22°C
(72°F)
Average high12°C
(53°F)		13°C
(56°F)		18°C
(65°F)		23°C
(73°F)		27°C
(81°F)		29°C
(84°F)		32°C
(91°F)		33°C
(91°F)		30°C
(86°F)		24°C
(75°F)		19°C
(66°F)		13°C
(56°F)
Daily mean8°C
(46°F)		9°C
(48°F)		13°C
(56°F)		17°C
(63°F)		22°C
(71°F)		25°C
(76°F)		28°C
(82°F)		28°C
(82°F)		25°C
(77°F)		19°C
(67°F)		14°C
(58°F)		9°C
(48°F)
Average low4°C
(40°F)		5°C
(41°F)		9°C
(49°F)		13°C
(55°F)		18°C
(64°F)		21°C
(71°F)		24°C
(76°F)		24°C
(76°F)		21°C
(71°F)		16°C
(61°F)		11°C
(52°F)		5°C
(42°F)
Mean minimum-3°C
(27°F)		-1°C
(31°F)		3°C
(38°F)		6°C
(43°F)		12°C
(53°F)		17°C
(63°F)		22°C
(72°F)		22°C
(72°F)		16°C
(62°F)		10°C
(49°F)		5°C
(41°F)		-1°C
(30°F)
Minimum-5°C
(24°F)		-5°C
(22°F)		0°C
(33°F)		3°C
(38°F)		10°C
(50°F)		15°C
(59°F)		20°C
(69°F)		21°C
(70°F)		15°C
(59°F)		8°C
(47°F)		2°C
(36°F)		-2°C
(28°F)

Compare climate in Haikou with other places

Compare temperature, precipitation, sunshine, UV index in Haikou, China with other places around the world.

Monthly average precipitation in Haikou, China

Haikou usually has the most precipitation in May, June and July, with an average of 17 rainy days and 238 mm (9.4 inches) of precipitation per month. The driest months in Haikou are January, November and December. On average, 49 mm (1.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Haikou. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)44 (1.7)65 (2.6)122 (4.8)97 (3.8)207 (8.2)309 (12.1)199 (7.9)159 (6.3)98 (3.9)66 (2.6)64 (2.5)38 (1.5)
Average precipitation days (≥ 1 mm)7915131520181712788

Monthly sunshine hours in Haikou, China

The sunniest months in Haikou are May, July and August, when the sun shines an average of 8 hours 46 minutes a day. Least sunny months in Haikou: January, February and November receive an average of 6 hours 1 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Haikou. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours152196206244253208269293241208193196
Mean daily daylight hours10h 33m11h 10m11h 59m12h 50m13h 32m13h 54m13h 43m13h 6m12h 18m11h 27m10h 43m10h 21m

Solar UV radiation in Haikou, China

Haikou experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 12 - 12, which corresponds to the Extreme category of sun exposure. January, November and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 7. For more detailed information, check out our hourly Haikou UV Index data.

Average daily maximum UV levels by month for Haikou. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)6810111212121211975