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Monthly climate in Rui'an, China

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Rui'an features a humid subtropical climate (Cfa). Temperatures typically range between 10 °C (51 °F) and 29 °C (84 °F) through the year, but rarely can drop to 0 °C (32 °F) or can rise to as high as 34 °C (94 °F). The average annual precipitation amounts to about 1534 mm (60.4 inches) and receives 167 rainy days on the 1 mm (0.04 inches) threshold annually. Rui'an enjoys an average of 2988 hours of sunshine throughout the year, and daylight varies from 10 hours 24 minutes to 13 hours 51 minutes per day.

Monthly average temperatures in Rui'an, China

The warmest months in Rui'an are July, August and September, with daily mean temperatures ranging from 27 to 29 °C (80 - 84 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 10 to 12 °C (51 - 54 °F) throughout the day. On average each year, Rui'an experiences 116 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 Rui'an. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum20°C
(68°F)		20°C
(69°F)		22°C
(72°F)		27°C
(81°F)		30°C
(86°F)		32°C
(90°F)		33°C
(91°F)		34°C
(94°F)		34°C
(93°F)		31°C
(88°F)		25°C
(77°F)		22°C
(71°F)
Mean maximum18°C
(64°F)		18°C
(65°F)		21°C
(70°F)		25°C
(77°F)		28°C
(83°F)		30°C
(86°F)		32°C
(91°F)		33°C
(92°F)		33°C
(91°F)		29°C
(85°F)		24°C
(76°F)		20°C
(68°F)
Average high13°C
(55°F)		13°C
(55°F)		16°C
(61°F)		20°C
(68°F)		24°C
(76°F)		27°C
(81°F)		30°C
(87°F)		31°C
(88°F)		29°C
(84°F)		24°C
(76°F)		20°C
(68°F)		15°C
(59°F)
Daily mean10°C
(51°F)		10°C
(51°F)		14°C
(57°F)		17°C
(64°F)		22°C
(72°F)		25°C
(78°F)		29°C
(84°F)		29°C
(84°F)		27°C
(80°F)		22°C
(72°F)		18°C
(64°F)		12°C
(54°F)
Average low8°C
(47°F)		8°C
(48°F)		12°C
(54°F)		15°C
(60°F)		20°C
(69°F)		24°C
(75°F)		27°C
(81°F)		27°C
(81°F)		25°C
(77°F)		20°C
(69°F)		15°C
(60°F)		10°C
(50°F)
Mean minimum2°C
(36°F)		5°C
(41°F)		8°C
(46°F)		10°C
(51°F)		16°C
(60°F)		20°C
(69°F)		26°C
(78°F)		26°C
(79°F)		22°C
(71°F)		15°C
(59°F)		11°C
(52°F)		4°C
(40°F)
Minimum0°C
(32°F)		1°C
(34°F)		5°C
(42°F)		9°C
(48°F)		14°C
(57°F)		19°C
(66°F)		25°C
(77°F)		26°C
(78°F)		20°C
(69°F)		14°C
(58°F)		9°C
(48°F)		2°C
(36°F)

Compare climate in Rui'an with other places

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

Monthly average precipitation in Rui'an, China

Rui'an usually has the most precipitation in June, July and August, with an average of 19 rainy days and 221 mm (8.7 inches) of precipitation per month. The driest months in Rui'an are January, February and December. On average, 57 mm (2.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Rui'an. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)54 (2.1)65 (2.6)116 (4.6)104 (4.1)145 (5.7)256 (10.1)171 (6.7)235 (9.2)124 (4.9)132 (5.2)79 (3.1)53 (2.1)
Average precipitation days (≥ 1 mm)8101613151917221691111

Monthly sunshine hours in Rui'an, China

The sunniest months in Rui'an are July, August and September, when the sun shines an average of 9 hours 47 minutes a day. Least sunny months in Rui'an: January, November and December receive an average of 6 hours 30 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Rui'an. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours174213250261276239307316277248213210
Mean daily daylight hours10h 35m11h 11m11h 59m12h 49m13h 30m13h 51m13h 41m13h 4m12h 17m11h 28m10h 45m10h 24m

Solar UV radiation in Rui'an, China

Rui'an 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 Moderate / 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 Rui'an UV Index data.

Average daily maximum UV levels by month for Rui'an. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)6810111212131211975