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Monthly climate in Tonghaikou, China

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Tonghaikou features a humid subtropical climate (Cfa). Temperatures typically range between 5 °C (41 °F) and 29 °C (85 °F) through the year, but rarely can drop to -6 °C (21 °F) or can rise to as high as 39 °C (102 °F). The average annual precipitation amounts to about 1430 mm (56.3 inches) and receives 130 rainy days on the 1 mm (0.04 inches) threshold annually. Tonghaikou enjoys an average of 2939 hours of sunshine throughout the year, and daylight varies from 10 hours 13 minutes to 14 hours 3 minutes per day.

Monthly average temperatures in Tonghaikou, China

The warmest months in Tonghaikou are June, July and August, with daily mean temperatures ranging from 26 to 29 °C (79 - 85 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 5 to 7 °C (41 - 45 °F) throughout the day. On average each year, Tonghaikou experiences 135 days above 25 °C (77.0 °F) and 16 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Tonghaikou. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum19°C
(67°F)		27°C
(81°F)		29°C
(85°F)		32°C
(90°F)		35°C
(96°F)		35°C
(96°F)		39°C
(102°F)		38°C
(101°F)		38°C
(100°F)		37°C
(98°F)		28°C
(82°F)		19°C
(67°F)
Mean maximum16°C
(60°F)		21°C
(69°F)		27°C
(81°F)		31°C
(87°F)		33°C
(93°F)		34°C
(93°F)		36°C
(97°F)		37°C
(99°F)		35°C
(96°F)		32°C
(90°F)		26°C
(79°F)		17°C
(64°F)
Average high8°C
(47°F)		11°C
(52°F)		17°C
(63°F)		22°C
(72°F)		27°C
(80°F)		30°C
(86°F)		32°C
(90°F)		33°C
(92°F)		29°C
(85°F)		23°C
(73°F)		18°C
(65°F)		11°C
(53°F)
Daily mean5°C
(41°F)		7°C
(45°F)		13°C
(56°F)		18°C
(64°F)		22°C
(73°F)		26°C
(79°F)		29°C
(84°F)		29°C
(85°F)		25°C
(78°F)		18°C
(65°F)		14°C
(57°F)		7°C
(45°F)
Average low2°C
(36°F)		4°C
(39°F)		9°C
(49°F)		14°C
(57°F)		18°C
(65°F)		23°C
(73°F)		26°C
(79°F)		26°C
(79°F)		22°C
(71°F)		15°C
(59°F)		10°C
(50°F)		4°C
(39°F)
Mean minimum-4°C
(25°F)		-1°C
(30°F)		3°C
(37°F)		7°C
(45°F)		13°C
(56°F)		18°C
(65°F)		22°C
(73°F)		22°C
(71°F)		18°C
(64°F)		10°C
(50°F)		3°C
(38°F)		-3°C
(27°F)
Minimum-6°C
(21°F)		-5°C
(23°F)		2°C
(35°F)		6°C
(42°F)		12°C
(53°F)		16°C
(60°F)		21°C
(70°F)		20°C
(68°F)		16°C
(62°F)		9°C
(48°F)		2°C
(37°F)		-4°C
(25°F)

Compare climate in Tonghaikou with other places

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

Monthly average precipitation in Tonghaikou, China

Tonghaikou usually has the most precipitation in May, June and July, with an average of 13 rainy days and 225 mm (8.9 inches) of precipitation per month. The driest months in Tonghaikou are January, November and December. On average, 42 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Tonghaikou. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)52 (2.1)61 (2.4)121 (4.8)149 (5.9)207 (8.1)236 (9.3)232 (9.1)139 (5.5)99 (3.9)61 (2.4)45 (1.8)29 (1.1)
Average precipitation days (≥ 1 mm)71114111314131311887

Monthly sunshine hours in Tonghaikou, China

The sunniest months in Tonghaikou are June, July and August, when the sun shines an average of 9 hours 42 minutes a day. Least sunny months in Tonghaikou: January, February and October receive an average of 6 hours 38 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Tonghaikou. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours174214234238270279300312258216218220
Mean daily daylight hours10h 25m11h 6m11h 59m12h 54m13h 40m14h 3m13h 51m13h 11m12h 19m11h 24m10h 37m10h 13m

Solar UV radiation in Tonghaikou, China

Tonghaikou experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure. January, February and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Tonghaikou UV Index data.

Average daily maximum UV levels by month for Tonghaikou. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)568101111121210864