Changzhou climate

Name: Changzhou
Address: CN

Changzhou is warmest in July, with average highs of 31 °C, and coldest in January, when nights average -0.5 °C. June is the wettest month (245 mm) and December the driest (37 mm). Figures are 1991–2020 climate normals.

Across a full year Changzhou averages 1,258 mm of rain, 138 days above 25 °C and 42 days below freezing.

China · population 3,290,918 · 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 31 °C
Coldest month January -0.5 °C
Driest month December 37 mm
Wettest month June 245 mm
Least cloud December 49 % cloud
Hottest on record July 39 °C
Coldest on record February -13 °C

What to expectChangzhou through the year

Changzhou has a clear annual cycle: average daily highs run from 7.9 °C in January to 31 °C in July, a swing of 24 °C in mean temperature across the year.

Counted across a normal year, 138 days a year reach 25 °C, 60 of them reach 30 °C, 42 nights drop below freezing. The warmest reading in the 1991–2020 record is 39 °C, in July.

Rain is strongly seasonal. June averages 245 mm against 37 mm in December — 6.6 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	7.9 °C	59 mm	57 %
February	10.2 °C	57 mm	62 %
March	14.6 °C	81 mm	66 %
April	20.5 °C	95 mm	66 %
May	25.4 °C	121 mm	67 %
June	28.3 °C	245 mm	76 %
July	31.5 °C	206 mm	70 %
August	31.1 °C	172 mm	62 %
September	27.3 °C	82 mm	57 %
October	22.5 °C	52 mm	52 %
November	16.6 °C	52 mm	51 %
December	10.2 °C	37 mm	49 %

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	7.9 °C	-0.5 °C	3.6 °C	19.8 °C	-12.2 °C	0	0	18
February	10.2 °C	1.5 °C	5.8 °C	24.7 °C	-13.5 °C	0	0	10
March	14.6 °C	5.8 °C	10.0 °C	27.9 °C	-4.5 °C	1	0	2
April	20.5 °C	11.6 °C	15.8 °C	32.8 °C	0.0 °C	5	1	0
May	25.4 °C	17.0 °C	20.9 °C	36.7 °C	8.0 °C	17	3	0
June	28.3 °C	21.2 °C	24.5 °C	37.2 °C	14.1 °C	25	9	0
July	31.5 °C	25.4 °C	28.1 °C	39.1 °C	17.1 °C	30	22	0
August	31.1 °C	24.8 °C	27.6 °C	38.8 °C	17.6 °C	30	20	0
September	27.3 °C	20.2 °C	23.4 °C	36.1 °C	12.6 °C	24	5	0
October	22.5 °C	14.4 °C	18.1 °C	31.2 °C	4.7 °C	7	0	0
November	16.6 °C	8.3 °C	12.2 °C	28.5 °C	-5.3 °C	0	0	1
December	10.2 °C	1.7 °C	5.8 °C	21.2 °C	-10.4 °C	0	0	11

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	59 mm	8	10 h/day	57 %	73 %	15 km/h
February	57 mm	8	11 h/day	62 %	73 %	16 km/h
March	81 mm	10	12 h/day	66 %	73 %	18 km/h
April	95 mm	9	13 h/day	66 %	73 %	18 km/h
May	121 mm	10	14 h/day	67 %	74 %	17 km/h
June	245 mm	13	14 h/day	76 %	79 %	16 km/h
July	206 mm	15	14 h/day	70 %	82 %	15 km/h
August	172 mm	15	13 h/day	62 %	81 %	16 km/h
September	82 mm	9	12 h/day	57 %	79 %	15 km/h
October	52 mm	6	11 h/day	52 %	74 %	15 km/h
November	52 mm	7	11 h/day	51 %	74 %	16 km/h
December	37 mm	6	10 h/day	49 %	72 %	16 km/h

How Changzhou 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
Changzhou	31 °C	-0.5 °C	1,258 mm	138
Jiangyin · China	31 °C	-0.6 °C	1,254 mm	137
Wuxi · China	31 °C	0.05 °C	1,354 mm	137
Yixing · China	31 °C	0.5 °C	1,482 mm	130
Zhenjiang · China	31 °C	-1.2 °C	1,230 mm	134
Changshu · China	32 °C	-0.2 °C	1,283 mm	138
Taizhou · China	31 °C	-1.5 °C	1,201 mm	136

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

QuestionsCommon questions about Changzhou’s climate

When is the best time to visit Changzhou?

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

How hot does Changzhou get?

In July, the warmest month, daily highs average 31 °C. About 60 days a year pass 30 °C. The highest value in the 1991–2020 record is 39 °C.

How cold does it get in winter?

Nights average -0.5 °C in January, the coldest month. A normal year has 42 nights below freezing.

Which month is wettest in Changzhou?

June, averaging 245 mm over 13 days with rain. The driest month is December with 37 mm. The year as a whole averages 1,258 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 Changzhou 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
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.