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Monthly climate in Sansha, China

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Sansha features a humid subtropical climate (Cfa). Temperatures typically range between 11 °C (51 °F) and 28 °C (83 °F) through the year, but rarely can drop to 1 °C (34 °F) or can rise to as high as 33 °C (92 °F). The average annual precipitation amounts to about 1591 mm (62.6 inches) and receives 176 rainy days on the 1 mm (0.04 inches) threshold annually. Sansha enjoys an average of 2987 hours of sunshine throughout the year, and daylight varies from 10 hours 27 minutes to 13 hours 47 minutes per day.

Monthly average temperatures in Sansha, China

The warmest months in Sansha are July, August and September, with daily mean temperatures ranging from 26 to 28 °C (80 - 83 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 11 to 13 °C (51 - 55 °F) throughout the day. On average each year, Sansha experiences 113 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 Sansha. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum19°C
(67°F)		21°C
(69°F)		24°C
(75°F)		26°C
(79°F)		29°C
(85°F)		32°C
(90°F)		32°C
(90°F)		33°C
(92°F)		33°C
(92°F)		30°C
(87°F)		25°C
(76°F)		23°C
(73°F)
Mean maximum17°C
(64°F)		18°C
(65°F)		21°C
(71°F)		25°C
(77°F)		28°C
(82°F)		30°C
(86°F)		32°C
(90°F)		32°C
(90°F)		32°C
(91°F)		29°C
(85°F)		24°C
(75°F)		20°C
(68°F)
Average high13°C
(55°F)		13°C
(55°F)		16°C
(61°F)		20°C
(68°F)		24°C
(75°F)		27°C
(81°F)		30°C
(86°F)		30°C
(86°F)		28°C
(83°F)		24°C
(75°F)		19°C
(67°F)		14°C
(58°F)
Daily mean11°C
(51°F)		11°C
(51°F)		14°C
(57°F)		18°C
(64°F)		22°C
(72°F)		25°C
(78°F)		28°C
(83°F)		28°C
(83°F)		26°C
(80°F)		22°C
(71°F)		17°C
(64°F)		13°C
(55°F)
Average low9°C
(48°F)		9°C
(48°F)		12°C
(54°F)		16°C
(61°F)		20°C
(69°F)		24°C
(75°F)		27°C
(80°F)		27°C
(80°F)		25°C
(77°F)		20°C
(69°F)		16°C
(61°F)		11°C
(52°F)
Mean minimum4°C
(39°F)		5°C
(41°F)		8°C
(47°F)		11°C
(52°F)		16°C
(61°F)		21°C
(69°F)		25°C
(77°F)		25°C
(78°F)		22°C
(71°F)		16°C
(60°F)		11°C
(52°F)		5°C
(42°F)
Minimum1°C
(34°F)		2°C
(36°F)		7°C
(44°F)		9°C
(48°F)		13°C
(55°F)		19°C
(67°F)		24°C
(76°F)		25°C
(77°F)		20°C
(68°F)		15°C
(59°F)		10°C
(50°F)		4°C
(40°F)

Compare climate in Sansha with other places

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

Monthly average precipitation in Sansha, China

Sansha usually has the most precipitation in June, July and August, with an average of 20 rainy days and 242 mm (9.5 inches) of precipitation per month. The driest months in Sansha are January, February and December. On average, 61 mm (2.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sansha. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)51 (2.0)80 (3.1)133 (5.2)104 (4.1)144 (5.7)314 (12.4)147 (5.8)265 (10.4)112 (4.4)105 (4.1)83 (3.3)53 (2.1)
Average precipitation days (≥ 1 mm)91117141521182217101111

Monthly sunshine hours in Sansha, China

The sunniest months in Sansha are July, August and September, when the sun shines an average of 9 hours 49 minutes a day. Least sunny months in Sansha: January, November and December receive an average of 6 hours 29 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sansha. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours173217247259275237311314278249213209
Mean daily daylight hours10h 38m11h 13m12h 0m12h 47m13h 27m13h 47m13h 37m13h 2m12h 17m11h 29m10h 48m10h 27m

Solar UV radiation in Sansha, China

Sansha experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 12 - 13, which corresponds to the Extreme category of sun exposure. January, November and December are in the 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 Sansha UV Index data.

Average daily maximum UV levels by month for Sansha. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)6810111212121311976