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Monthly climate in Hainan, China

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Hainan features a humid continental climate (Dwb). Temperatures typically range between -20 °C (-4 °F) and 23 °C (74 °F) through the year, but rarely can drop to -38 °C (-36 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 768 mm (30.3 inches) and receives 88 rainy days on the 1 mm (0.04 inches) threshold annually. Hainan enjoys an average of 3269 hours of sunshine throughout the year, and daylight varies from 8 hours 32 minutes to 15 hours 50 minutes per day.

Monthly average temperatures in Hainan, China

The warmest months in Hainan are June, July and August, with daily mean temperatures ranging from 19 to 23 °C (67 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -20 to -15 °C (-4 - 5 °F) throughout the day. On average each year, Hainan experiences 49 days above 25 °C (77.0 °F) and 166 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Hainan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum-3°C
(27°F)		8°C
(47°F)		17°C
(63°F)		25°C
(78°F)		31°C
(89°F)		36°C
(97°F)		34°C
(93°F)		29°C
(85°F)		28°C
(83°F)		27°C
(80°F)		14°C
(57°F)		6°C
(43°F)
Mean maximum-7°C
(20°F)		1°C
(34°F)		13°C
(56°F)		23°C
(74°F)		30°C
(86°F)		29°C
(85°F)		32°C
(90°F)		29°C
(85°F)		26°C
(79°F)		21°C
(71°F)		10°C
(50°F)		-3°C
(27°F)
Average high-14°C
(7°F)		-9°C
(16°F)		2°C
(36°F)		12°C
(55°F)		20°C
(68°F)		24°C
(75°F)		28°C
(82°F)		24°C
(76°F)		20°C
(68°F)		12°C
(53°F)		-2°C
(29°F)		-13°C
(9°F)
Daily mean-20°C
(-4°F)		-15°C
(5°F)		-3°C
(26°F)		7°C
(44°F)		14°C
(58°F)		19°C
(67°F)		23°C
(74°F)		20°C
(69°F)		15°C
(59°F)		6°C
(42°F)		-6°C
(21°F)		-18°C
(0°F)
Average low-25°C
(-12°F)		-21°C
(-5°F)		-9°C
(15°F)		0°C
(33°F)		8°C
(47°F)		14°C
(58°F)		19°C
(67°F)		16°C
(62°F)		10°C
(49°F)		0°C
(32°F)		-10°C
(13°F)		-22°C
(-7°F)
Mean minimum-32°C
(-25°F)		-29°C
(-20°F)		-22°C
(-7°F)		-7°C
(20°F)		1°C
(35°F)		9°C
(48°F)		15°C
(59°F)		9°C
(49°F)		2°C
(36°F)		-7°C
(20°F)		-21°C
(-6°F)		-29°C
(-19°F)
Minimum-38°C
(-36°F)		-33°C
(-27°F)		-31°C
(-23°F)		-9°C
(16°F)		0°C
(33°F)		6°C
(43°F)		13°C
(57°F)		6°C
(42°F)		0°C
(33°F)		-10°C
(15°F)		-25°C
(-14°F)		-32°C
(-26°F)

Compare climate in Hainan with other places

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

Monthly average precipitation in Hainan, China

Hainan usually has the most precipitation in June, July and August, with an average of 16 rainy days and 161 mm (6.3 inches) of precipitation per month. The driest months in Hainan are January, February and December. On average, 7 mm (0.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hainan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)5 (0.2)6 (0.2)13 (0.5)32 (1.3)72 (2.8)126 (4.9)175 (6.9)183 (7.2)103 (4.1)22 (0.9)22 (0.9)9 (0.3)
Average precipitation days (≥ 1 mm)1134111517179442

Monthly sunshine hours in Hainan, China

The sunniest months in Hainan are May, June and July, when the sun shines an average of 10 hours 51 minutes a day. Least sunny months in Hainan: January, November and December receive an average of 6 hours 45 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hainan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours182239283302330327341285284254214225
Mean daily daylight hours8h 56m10h 15m11h 54m13h 37m15h 5m15h 50m15h 27m14h 9m12h 31m10h 50m9h 19m8h 32m

Solar UV radiation in Hainan, China

Hainan experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 9, which corresponds to the Very High category of sun exposure. January, November and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly Hainan UV Index data.

Average daily maximum UV levels by month for Hainan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)234678986421