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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 15 °C (59 °F) and 27 °C (81 °F) through the year, but rarely can drop to 3 °C (38 °F) or can rise to as high as 37 °C (99 °F). The average annual precipitation amounts to about 2081 mm (81.9 inches) and receives 238 rainy days on the 1 mm (0.04 inches) threshold annually. Hekou enjoys an average of 3125 hours of sunshine throughout the year, and daylight varies from 10 hours 45 minutes to 13 hours 28 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 27 °C (80 - 81 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 15 to 16 °C (59 - 60 °F) throughout the day. On average each year, Hekou experiences 188 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 Hekou. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum26°C
(78°F)		31°C
(87°F)		33°C
(91°F)		36°C
(98°F)		37°C
(99°F)		36°C
(97°F)		35°C
(96°F)		35°C
(96°F)		34°C
(93°F)		31°C
(88°F)		30°C
(86°F)		26°C
(80°F)
Mean maximum25°C
(77°F)		27°C
(82°F)		32°C
(89°F)		34°C
(94°F)		35°C
(95°F)		34°C
(93°F)		34°C
(94°F)		35°C
(95°F)		33°C
(92°F)		30°C
(86°F)		28°C
(83°F)		24°C
(76°F)
Average high19°C
(66°F)		20°C
(68°F)		24°C
(76°F)		27°C
(80°F)		29°C
(85°F)		31°C
(88°F)		30°C
(86°F)		30°C
(87°F)		29°C
(84°F)		25°C
(78°F)		23°C
(73°F)		19°C
(66°F)
Daily mean15°C
(59°F)		16°C
(60°F)		19°C
(67°F)		22°C
(72°F)		25°C
(77°F)		27°C
(81°F)		26°C
(80°F)		26°C
(80°F)		25°C
(77°F)		22°C
(72°F)		19°C
(66°F)		15°C
(59°F)
Average low12°C
(54°F)		12°C
(54°F)		16°C
(60°F)		18°C
(65°F)		22°C
(71°F)		24°C
(76°F)		24°C
(75°F)		24°C
(75°F)		22°C
(73°F)		20°C
(67°F)		16°C
(61°F)		12°C
(53°F)
Mean minimum7°C
(46°F)		9°C
(48°F)		12°C
(54°F)		14°C
(57°F)		18°C
(64°F)		22°C
(71°F)		22°C
(73°F)		22°C
(71°F)		20°C
(68°F)		15°C
(60°F)		12°C
(53°F)		7°C
(44°F)
Minimum4°C
(39°F)		6°C
(42°F)		11°C
(52°F)		11°C
(52°F)		15°C
(60°F)		20°C
(68°F)		22°C
(72°F)		21°C
(71°F)		18°C
(64°F)		14°C
(57°F)		10°C
(51°F)		3°C
(38°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 July, August and October, with an average of 22 rainy days and 252 mm (9.9 inches) of precipitation per month. The driest months in Hekou are February, November and December. On average, 101 mm (4.0 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)109 (4.3)105 (4.1)167 (6.6)195 (7.7)160 (6.3)202 (7.9)225 (8.8)313 (12.3)193 (7.6)217 (8.6)100 (3.9)97 (3.8)
Average precipitation days (≥ 1 mm)181823191920242220221815

Monthly sunshine hours in Hekou, China

The sunniest months in Hekou are May, June and September, when the sun shines an average of 9 hours 43 minutes a day. Least sunny months in Hekou: January, February and December receive an average of 7 hours 5 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 hours173229273255312284283278287261241241
Mean daily daylight hours10h 54m11h 23m12h 1m12h 40m13h 12m13h 28m13h 20m12h 52m12h 14m11h 36m11h 2m10h 45m

Solar UV radiation in Hekou, China

Hekou experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 14 - 14, which corresponds to the Extreme category of sun exposure. January, November and December are in the High / Very High exposure category. In these months, the maximum values of the UV index do not exceed 9. 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)810121314141414131297