Yancheng climate

Name: Yancheng
Address: CN

Yancheng is warmest in July, with average highs of 31 °C, and coldest in January, when nights average -2.0 °C. July is the wettest month (247 mm) and December the driest (32 mm). Figures are 1991–2020 climate normals.

Across a full year Yancheng averages 1,104 mm of rain, 129 days above 25 °C and 62 days below freezing.

China · population 1,615,717 · 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 -2.0 °C
Driest month December 32 mm
Wettest month July 247 mm
Least cloud December 49 % cloud
Hottest on record August 39 °C
Coldest on record January -12 °C

What to expectYancheng through the year

Yancheng has a clear annual cycle: average daily highs run from 6.8 °C in January to 31 °C in July, a swing of 25 °C in mean temperature across the year.

Counted across a normal year, 129 days a year reach 25 °C, 50 of them reach 30 °C, 62 nights drop below freezing. The warmest reading in the 1991–2020 record is 39 °C, in August.

Rain is strongly seasonal. July averages 247 mm against 32 mm in December — 7.8 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	6.8 °C	38 mm	55 %
February	9.1 °C	39 mm	59 %
March	13.7 °C	58 mm	62 %
April	19.9 °C	64 mm	62 %
May	25.2 °C	91 mm	65 %
June	28.4 °C	160 mm	70 %
July	30.7 °C	247 mm	71 %
August	30.0 °C	185 mm	63 %
September	26.2 °C	92 mm	57 %
October	21.7 °C	47 mm	52 %
November	15.6 °C	52 mm	51 %
December	9.1 °C	32 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	6.8 °C	-2.0 °C	2.2 °C	19.2 °C	-12.3 °C	0	0	23
February	9.1 °C	-0.3 °C	4.1 °C	25.5 °C	-8.3 °C	0	0	16
March	13.7 °C	3.9 °C	8.4 °C	27.4 °C	-5.7 °C	0	0	4
April	19.9 °C	9.6 °C	14.4 °C	33.2 °C	-2.5 °C	4	1	0
May	25.2 °C	15.3 °C	19.9 °C	36.2 °C	4.3 °C	16	4	0
June	28.4 °C	19.8 °C	23.7 °C	37.6 °C	12.8 °C	25	9	0
July	30.7 °C	24.0 °C	27.0 °C	37.3 °C	16.7 °C	30	19	0
August	30.0 °C	23.7 °C	26.5 °C	39.2 °C	16.4 °C	29	16	0
September	26.2 °C	19.0 °C	22.3 °C	34.8 °C	10.2 °C	20	2	0
October	21.7 °C	13.0 °C	17.0 °C	30.2 °C	2.2 °C	4	0	0
November	15.6 °C	6.7 °C	10.9 °C	27.9 °C	-7.1 °C	0	0	2
December	9.1 °C	0.1 °C	4.4 °C	20.2 °C	-9.8 °C	0	0	16

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	38 mm	6	10 h/day	55 %	69 %	15 km/h
February	39 mm	6	11 h/day	59 %	70 %	17 km/h
March	58 mm	7	12 h/day	62 %	70 %	18 km/h
April	64 mm	7	13 h/day	62 %	69 %	18 km/h
May	91 mm	8	14 h/day	65 %	70 %	17 km/h
June	160 mm	10	14 h/day	70 %	76 %	16 km/h
July	247 mm	16	14 h/day	71 %	83 %	15 km/h
August	185 mm	16	13 h/day	63 %	83 %	16 km/h
September	92 mm	9	12 h/day	57 %	79 %	15 km/h
October	47 mm	6	11 h/day	52 %	72 %	15 km/h
November	52 mm	6	10 h/day	51 %	71 %	16 km/h
December	32 mm	5	10.0 h/day	49 %	69 %	16 km/h

How Yancheng 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
Yancheng	31 °C	-2.0 °C	1,104 mm	129
Dongtai · China	31 °C	-1.8 °C	1,177 mm	132
Taizhou · China	31 °C	-1.5 °C	1,201 mm	136
Huai'an · China	31 °C	-2.7 °C	1,015 mm	135
Rugao · China	31 °C	-1.0 °C	1,228 mm	129
Zhenjiang · China	31 °C	-1.2 °C	1,230 mm	134
Jiangyin · China	31 °C	-0.6 °C	1,254 mm	137

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

QuestionsCommon questions about Yancheng’s climate

When is the best time to visit Yancheng?

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 Yancheng get?

In July, the warmest month, daily highs average 31 °C. About 50 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 -2.0 °C in January, the coldest month. A normal year has 62 nights below freezing.

Which month is wettest in Yancheng?

July, averaging 247 mm over 16 days with rain. The driest month is December with 32 mm. The year as a whole averages 1,104 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 Yancheng 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: 33.358°, 120.157° (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.