Hangzhou climate

Name: Hangzhou
Address: CN

Hangzhou is warmest in July, with average highs of 33 °C, and coldest in January, when nights average 0.9 °C. June is the wettest month (306 mm) and October the driest (58 mm). Figures are 1991–2020 climate normals.

Across a full year Hangzhou averages 1,477 mm of rain, 144 days above 25 °C and 28 days below freezing.

China · population 9,236,032 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month July 33 °C
Coldest month January 0.9 °C
Driest month October 58 mm
Wettest month June 306 mm
Least cloud December 50 % cloud
Hottest on record August 42 °C
Coldest on record January -14 °C

What to expectHangzhou through the year

Hangzhou has a clear annual cycle: average daily highs run from 8.7 °C in January to 33 °C in July, a swing of 24 °C in mean temperature across the year.

Counted across a normal year, 144 days a year reach 25 °C, 71 of them reach 30 °C, 28 nights drop below freezing. The warmest reading in the 1991–2020 record is 42 °C, in August.

Rain is strongly seasonal. June averages 306 mm against 58 mm in October — 5.3 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	8.7 °C	80 mm	60 %
February	11.0 °C	76 mm	64 %
March	15.4 °C	119 mm	69 %
April	21.2 °C	133 mm	69 %
May	25.9 °C	158 mm	69 %
June	28.3 °C	306 mm	80 %
July	32.8 °C	176 mm	70 %
August	32.3 °C	149 mm	62 %
September	27.8 °C	97 mm	60 %
October	23.0 °C	58 mm	52 %
November	17.4 °C	66 mm	54 %
December	11.1 °C	59 mm	50 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	8.7 °C	0.9 °C	4.7 °C	24.1 °C	-14.3 °C	0	0	12
February	11.0 °C	2.7 °C	6.7 °C	27.3 °C	-6.3 °C	0	0	7
March	15.4 °C	6.7 °C	10.8 °C	30.2 °C	-4.8 °C	1	0	1
April	21.2 °C	12.2 °C	16.4 °C	32.8 °C	1.2 °C	7	1	0
May	25.9 °C	17.3 °C	21.3 °C	37.8 °C	7.5 °C	19	4	0
June	28.3 °C	21.5 °C	24.6 °C	37.4 °C	14.4 °C	24	10	0
July	32.8 °C	25.4 °C	28.8 °C	40.8 °C	17.4 °C	30	24	0
August	32.3 °C	25.1 °C	28.3 °C	42.1 °C	16.1 °C	30	23	0
September	27.8 °C	20.7 °C	24.0 °C	38.3 °C	11.3 °C	24	8	0
October	23.0 °C	15.0 °C	18.7 °C	33.8 °C	5.4 °C	8	1	0
November	17.4 °C	9.2 °C	13.0 °C	30.7 °C	-3.8 °C	1	0	0
December	11.1 °C	2.7 °C	6.7 °C	23.3 °C	-11.4 °C	0	0	8

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	80 mm	10	10 h/day	60 %	76 %	13 km/h
February	76 mm	10	11 h/day	64 %	76 %	14 km/h
March	119 mm	13	12 h/day	69 %	76 %	15 km/h
April	133 mm	12	13 h/day	69 %	75 %	15 km/h
May	158 mm	12	14 h/day	69 %	76 %	14 km/h
June	306 mm	16	14 h/day	80 %	82 %	13 km/h
July	176 mm	13	14 h/day	70 %	77 %	14 km/h
August	149 mm	15	13 h/day	62 %	78 %	15 km/h
September	97 mm	10	12 h/day	60 %	79 %	14 km/h
October	58 mm	6	11 h/day	52 %	75 %	14 km/h
November	66 mm	8	11 h/day	54 %	76 %	13 km/h
December	59 mm	7	10 h/day	50 %	75 %	13 km/h

How Hangzhou compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Hangzhou	33 °C	0.9 °C	1,477 mm	144
Shaoxing · China	33 °C	1.3 °C	1,573 mm	149
Huzhou · China	32 °C	0.8 °C	1,516 mm	134
Shangyu · China	33 °C	1.3 °C	1,550 mm	147
Jiaxing · China	32 °C	0.9 °C	1,458 mm	136
Puyang · China	33 °C	2.3 °C	1,611 mm	155
Cixi · China	32 °C	2.2 °C	1,426 mm	137

Planning a trip? See the best time to visit Hangzhou.

QuestionsCommon questions about Hangzhou’s climate

When is the best time to visit Hangzhou?

That depends on what you want, so the honest answer is a comparison rather than a single month. April, May, October sit closest to 20 °C on average, July is the warmest month and October the driest. The month-by-month table above has the full picture.

How hot does Hangzhou get?

In July, the warmest month, daily highs average 33 °C. About 71 days a year pass 30 °C. The highest value in the 1991–2020 record is 42 °C.

How cold does it get in winter?

Nights average 0.9 °C in January, the coldest month. A normal year has 28 nights below freezing.

Which month is wettest in Hangzhou?

June, averaging 306 mm over 16 days with rain. The driest month is October with 58 mm. The year as a whole averages 1,477 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Hangzhou rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 30.294°, 120.161° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.