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Monthly climate in Haimen, Jiangsu, China

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Haimen features a humid subtropical climate (Cfa).Temperatures typically range between 5 °C (42 °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 40 °C (104 °F).The average annual precipitation amounts to about 1189 mm (46.8 inches) and receives 119 rainy days on the 1 mm (0.04 inches) threshold annually.Haimen enjoys an average of 2942 hours of sunshine throughout the year, and daylight varies from 10 hours 5 minutes to 14 hours 11 minutes per day.

Monthly average temperatures in Haimen, Jiangsu, China §

The warmest months in Haimen are July, August and September, with daily mean temperatures ranging from 25 to 29 °C (77 - 84 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 5 to 7 °C (42 - 45 °F) throughout the day. On average each year, Haimen experiences 121 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 Haimen, Jiangsu, China.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 19°C
(67°F)		 25°C
(77°F)		 28°C
(82°F)		 31°C
(88°F)		 37°C
(98°F)		 37°C
(100°F)		 40°C
(104°F)		 38°C
(101°F)		 34°C
(94°F)		 32°C
(90°F)		 27°C
(81°F)		 20°C
(69°F)
Mean maximum 16°C
(60°F)		 19°C
(67°F)		 25°C
(77°F)		 29°C
(84°F)		 33°C
(91°F)		 33°C
(92°F)		 37°C
(98°F)		 36°C
(96°F)		 33°C
(92°F)		 29°C
(84°F)		 24°C
(75°F)		 18°C
(64°F)
Average high 8°C
(47°F)		 10°C
(50°F)		 15°C
(60°F)		 20°C
(68°F)		 25°C
(78°F)		 28°C
(83°F)		 31°C
(89°F)		 32°C
(90°F)		 28°C
(82°F)		 22°C
(73°F)		 18°C
(64°F)		 11°C
(52°F)
Daily mean 5°C
(42°F)		 6°C
(43°F)		 11°C
(52°F)		 15°C
(60°F)		 21°C
(70°F)		 24°C
(76°F)		 28°C
(83°F)		 29°C
(84°F)		 25°C
(77°F)		 19°C
(66°F)		 14°C
(57°F)		 7°C
(45°F)
Average low 2°C
(36°F)		 3°C
(37°F)		 7°C
(45°F)		 11°C
(53°F)		 17°C
(62°F)		 21°C
(70°F)		 25°C
(78°F)		 26°C
(79°F)		 22°C
(72°F)		 16°C
(61°F)		 10°C
(51°F)		 4°C
(39°F)
Mean minimum -5°C
(24°F)		 -2°C
(28°F)		 2°C
(36°F)		 6°C
(42°F)		 12°C
(54°F)		 18°C
(65°F)		 22°C
(72°F)		 23°C
(74°F)		 17°C
(63°F)		 10°C
(51°F)		 4°C
(39°F)		 -3°C
(27°F)
Minimum -8°C
(17°F)		 -5°C
(24°F)		 1°C
(35°F)		 4°C
(40°F)		 10°C
(50°F)		 16°C
(61°F)		 19°C
(66°F)		 21°C
(71°F)		 15°C
(60°F)		 8°C
(47°F)		 1°C
(34°F)		 -6°C
(21°F)

Compare climate in Haimen with other places

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

Monthly average precipitation in Haimen, Jiangsu, China §

Haimen usually has the most precipitation in July, August and September, with an average of 14 rainy days and 192 mm (7.6 inches) of precipitation per month.The driest months in Haimen are January, November and December. On average, 46 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Haimen, Jiangsu, China.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 47 (1.9) 51 (2.0) 62 (2.5) 70 (2.8) 106 (4.2) 128 (5.1) 246 (9.7) 173 (6.8) 158 (6.2) 55 (2.1) 49 (1.9) 43 (1.7)
Average precipitation days (≥ 1 mm) 7 9 10 8 9 12 16 14 12 7 7 8

Monthly sunshine hours in Haimen, Jiangsu, China §

The sunniest months in Haimen are May, July and August, when the sun shines an average of 9 hours 19 minutes a day.Least sunny months in Haimen: January, February and December receive an average of 6 hours 21 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Haimen, Jiangsu, China.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 156 212 246 258 286 272 276 304 257 242 216 210
Mean daily daylight hours 10h 18m 11h 2m 11h 59m 12h 57m 13h 46m 14h 11m 13h 58m 13h 15m 12h 20m 11h 21m 10h 31m 10h 5m

Solar UV radiation in Haimen, Jiangsu, China §

Haimen 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 Haimen UV Index data.

Average daily maximum UV levels by month for Haimen, Jiangsu, China.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 4 6 8 10 10 11 11 11 10 8 6 4