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Monthly climate in Suzhou, China

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Suzhou features a humid subtropical climate (Cwa). Temperatures typically range between 2 °C (36 °F) and 28 °C (82 °F) through the year, but rarely can drop to -13 °C (9 °F) or can rise to as high as 39 °C (103 °F). The average annual precipitation amounts to about 998 mm (39.3 inches) and receives 80 rainy days on the 1 mm (0.04 inches) threshold annually. Suzhou enjoys an average of 3086 hours of sunshine throughout the year, and daylight varies from 9 hours 56 minutes to 14 hours 19 minutes per day.

Monthly average temperatures in Suzhou, China

The warmest months in Suzhou are June, July and August, with daily mean temperatures ranging from 27 to 28 °C (80 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 5 °C (36 - 41 °F) throughout the day. On average each year, Suzhou experiences 125 days above 25 °C (77.0 °F) and 46 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Suzhou. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum17°C
(62°F)		26°C
(78°F)		28°C
(83°F)		32°C
(89°F)		37°C
(98°F)		39°C
(103°F)		37°C
(99°F)		36°C
(97°F)		34°C
(93°F)		34°C
(94°F)		26°C
(79°F)		18°C
(64°F)
Mean maximum13°C
(56°F)		19°C
(66°F)		25°C
(77°F)		30°C
(86°F)		35°C
(94°F)		37°C
(98°F)		36°C
(97°F)		35°C
(96°F)		32°C
(91°F)		29°C
(85°F)		23°C
(75°F)		15°C
(60°F)
Average high6°C
(43°F)		10°C
(50°F)		16°C
(61°F)		21°C
(70°F)		27°C
(81°F)		31°C
(89°F)		31°C
(88°F)		31°C
(88°F)		28°C
(83°F)		22°C
(71°F)		16°C
(62°F)		9°C
(48°F)
Daily mean2°C
(36°F)		5°C
(41°F)		11°C
(52°F)		16°C
(61°F)		22°C
(72°F)		27°C
(80°F)		28°C
(82°F)		28°C
(82°F)		23°C
(75°F)		17°C
(62°F)		11°C
(52°F)		4°C
(39°F)
Average low-2°C
(29°F)		1°C
(34°F)		6°C
(44°F)		11°C
(53°F)		17°C
(62°F)		22°C
(71°F)		24°C
(76°F)		24°C
(76°F)		20°C
(68°F)		12°C
(54°F)		6°C
(44°F)		-0°C
(32°F)
Mean minimum-8°C
(19°F)		-4°C
(24°F)		-0°C
(32°F)		4°C
(39°F)		11°C
(52°F)		17°C
(63°F)		21°C
(71°F)		19°C
(66°F)		15°C
(60°F)		5°C
(41°F)		-1°C
(30°F)		-8°C
(19°F)
Minimum-11°C
(12°F)		-7°C
(20°F)		-2°C
(29°F)		2°C
(36°F)		9°C
(49°F)		14°C
(58°F)		20°C
(67°F)		17°C
(63°F)		14°C
(57°F)		2°C
(37°F)		-3°C
(27°F)		-13°C
(9°F)

Compare climate in Suzhou with other places

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

Monthly average precipitation in Suzhou, China

Suzhou usually has the most precipitation in June, July and August, with an average of 11 rainy days and 207 mm (8.2 inches) of precipitation per month. The driest months in Suzhou are February, November and December. On average, 25 mm (1.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Suzhou. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)32 (1.3)25 (1.0)39 (1.5)36 (1.4)67 (2.6)135 (5.3)319 (12.6)168 (6.6)79 (3.1)49 (1.9)29 (1.1)20 (0.8)
Average precipitation days (≥ 1 mm)45666714137543

Monthly sunshine hours in Suzhou, China

The sunniest months in Suzhou are June, July and August, when the sun shines an average of 9 hours 49 minutes a day. Least sunny months in Suzhou: January, October and November receive an average of 6 hours 54 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Suzhou. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours176231263263292298303300262230227234
Mean daily daylight hours10h 10m10h 57m11h 58m13h 1m13h 53m14h 19m14h 6m13h 20m12h 21m11h 19m10h 24m9h 56m

Solar UV radiation in Suzhou, China

Suzhou experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 10 - 10, which corresponds to the Very High category of sun exposure. January, February and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Suzhou UV Index data.

Average daily maximum UV levels by month for Suzhou. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)4578101010109853