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Monthly climate in Hekou, China

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Hekou features a humid subtropical climate (Cfa). Temperatures typically range between 4 °C (40 °F) and 29 °C (84 °F) through the year, but rarely can drop to -8 °C (17 °F) or can rise to as high as 37 °C (99 °F). The average annual precipitation amounts to about 1352 mm (53.2 inches) and receives 119 rainy days on the 1 mm (0.04 inches) threshold annually. Hekou enjoys an average of 2989 hours of sunshine throughout the year, and daylight varies from 10 hours 8 minutes to 14 hours 8 minutes per day.

Monthly average temperatures in Hekou, China

The warmest months in Hekou are June, July and August, with daily mean temperatures ranging from 26 to 29 °C (79 - 84 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 7 °C (40 - 44 °F) throughout the day. On average each year, Hekou experiences 130 days above 25 °C (77.0 °F) and 22 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Hekou. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum18°C
(65°F)		27°C
(81°F)		28°C
(83°F)		31°C
(89°F)		33°C
(92°F)		35°C
(95°F)		37°C
(99°F)		37°C
(99°F)		35°C
(95°F)		35°C
(96°F)		28°C
(82°F)		19°C
(66°F)
Mean maximum15°C
(59°F)		20°C
(69°F)		26°C
(78°F)		30°C
(86°F)		32°C
(90°F)		33°C
(92°F)		35°C
(96°F)		36°C
(97°F)		34°C
(93°F)		31°C
(87°F)		25°C
(78°F)		17°C
(63°F)
Average high8°C
(46°F)		11°C
(52°F)		17°C
(63°F)		22°C
(71°F)		26°C
(79°F)		29°C
(85°F)		31°C
(89°F)		32°C
(91°F)		29°C
(84°F)		22°C
(72°F)		18°C
(64°F)		11°C
(51°F)
Daily mean4°C
(40°F)		7°C
(44°F)		13°C
(55°F)		17°C
(63°F)		22°C
(72°F)		26°C
(79°F)		28°C
(83°F)		29°C
(84°F)		24°C
(76°F)		18°C
(64°F)		13°C
(55°F)		6°C
(43°F)
Average low1°C
(34°F)		3°C
(37°F)		8°C
(47°F)		13°C
(55°F)		18°C
(64°F)		22°C
(72°F)		25°C
(77°F)		25°C
(78°F)		21°C
(69°F)		14°C
(57°F)		9°C
(48°F)		3°C
(37°F)
Mean minimum-5°C
(24°F)		-2°C
(29°F)		2°C
(37°F)		6°C
(43°F)		12°C
(54°F)		18°C
(65°F)		22°C
(72°F)		21°C
(70°F)		16°C
(61°F)		9°C
(48°F)		2°C
(36°F)		-3°C
(26°F)
Minimum-8°C
(17°F)		-4°C
(26°F)		1°C
(34°F)		5°C
(40°F)		10°C
(50°F)		16°C
(61°F)		21°C
(70°F)		19°C
(67°F)		15°C
(60°F)		7°C
(45°F)		1°C
(35°F)		-5°C
(24°F)

Compare climate in Hekou with other places

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

Monthly average precipitation in Hekou, China

Hekou usually has the most precipitation in May, June and July, with an average of 13 rainy days and 213 mm (8.4 inches) of precipitation per month. The driest months in Hekou are February, November and December. On average, 39 mm (1.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hekou. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)49 (1.9)48 (1.9)104 (4.1)120 (4.7)182 (7.2)222 (8.7)236 (9.3)153 (6.0)105 (4.1)66 (2.6)44 (1.7)23 (0.9)
Average precipitation days (≥ 1 mm)791181114161311775

Monthly sunshine hours in Hekou, China

The sunniest months in Hekou are June, July and August, when the sun shines an average of 9 hours 44 minutes a day. Least sunny months in Hekou: January, February and November receive an average of 6 hours 46 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hekou. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours172212239244273286302306264228224232
Mean daily daylight hours10h 21m11h 3m11h 59m12h 56m13h 44m14h 8m13h 56m13h 14m12h 19m11h 22m10h 33m10h 8m

Solar UV radiation in Hekou, China

Hekou experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 11 - 11, 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 Hekou UV Index data.

Average daily maximum UV levels by month for Hekou. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)56891011111110864