Jiangmen climate

Name: Jiangmen
Address: CN

Jiangmen is warmest in July, with average highs of 32 °C, and coldest in January, when nights average 11 °C. June is the wettest month (307 mm) and January the driest (32 mm). Figures are 1991–2020 climate normals.

Across a full year Jiangmen averages 1,798 mm of rain and 244 days above 25 °C.

China · population 1,795,459 · 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 32 °C
Coldest month January 11 °C
Driest month January 32 mm
Wettest month June 307 mm
Least cloud October 47 % cloud
Hottest on record July 38 °C
Coldest on record January 1.6 °C

What to expectJiangmen through the year

Jiangmen has a clear annual cycle: average daily highs run from 19 °C in January to 32 °C in July, a swing of 14 °C in mean temperature across the year.

Counted across a normal year, 244 days a year reach 25 °C, 115 of them reach 30 °C. The warmest reading in the 1991–2020 record is 38 °C, in July.

Rain is strongly seasonal. June averages 307 mm against 32 mm in January — 9.6 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	19.1 °C	32 mm	59 %
February	20.7 °C	43 mm	71 %
March	23.8 °C	90 mm	78 %
April	27.2 °C	165 mm	77 %
May	29.4 °C	277 mm	79 %
June	30.8 °C	307 mm	84 %
July	31.6 °C	234 mm	77 %
August	31.4 °C	297 mm	74 %
September	30.3 °C	215 mm	62 %
October	28.2 °C	71 mm	47 %
November	24.7 °C	34 mm	48 %
December	20.3 °C	33 mm	50 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	19.1 °C	10.8 °C	14.7 °C	28.2 °C	1.6 °C	2	0
February	20.7 °C	12.9 °C	16.5 °C	30.8 °C	3.2 °C	6	0
March	23.8 °C	16.4 °C	19.7 °C	31.3 °C	5.5 °C	14	0
April	27.2 °C	20.5 °C	23.3 °C	33.8 °C	9.9 °C	23	5
May	29.4 °C	23.5 °C	26.0 °C	34.9 °C	16.5 °C	29	14
June	30.8 °C	25.4 °C	27.7 °C	35.9 °C	19.9 °C	30	21
July	31.6 °C	25.8 °C	28.2 °C	38.3 °C	22.5 °C	31	25
August	31.4 °C	25.6 °C	28.0 °C	35.7 °C	23.5 °C	31	24
September	30.3 °C	24.1 °C	26.8 °C	34.7 °C	17.0 °C	29	19
October	28.2 °C	20.7 °C	24.1 °C	33.9 °C	11.0 °C	28	6
November	24.7 °C	16.5 °C	20.3 °C	32.4 °C	6.4 °C	16	1
December	20.3 °C	11.8 °C	15.8 °C	28.4 °C	1.6 °C	4	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	32 mm	5	11 h/day	59 %	71 %	15 km/h
February	43 mm	8	11 h/day	71 %	76 %	15 km/h
March	90 mm	12	12 h/day	78 %	79 %	16 km/h
April	165 mm	15	13 h/day	77 %	82 %	16 km/h
May	277 mm	22	13 h/day	79 %	84 %	14 km/h
June	307 mm	23	14 h/day	84 %	85 %	15 km/h
July	234 mm	22	13 h/day	77 %	84 %	15 km/h
August	297 mm	24	13 h/day	74 %	85 %	13 km/h
September	215 mm	18	12 h/day	62 %	82 %	13 km/h
October	71 mm	8	12 h/day	47 %	73 %	14 km/h
November	34 mm	5	11 h/day	48 %	70 %	15 km/h
December	33 mm	4	11 h/day	50 %	66 %	16 km/h

How Jiangmen 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
Jiangmen	32 °C	11 °C	1,798 mm	244
Zhongshan · China	31 °C	12 °C	1,688 mm	239
Jing’an · China	30 °C	13 °C	1,767 mm	217
Changsha · China	31 °C	11 °C	1,748 mm	245
Zhuhai · China	30 °C	12 °C	1,726 mm	216
Guangzhou · China	32 °C	10 °C	1,888 mm	240
Sanshui · China	32 °C	10 °C	1,981 mm	230

Where Jiangmen ranks

Ranking	Position	Value
Places with the best weather in Asia in December	37thof 50	96/100

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

QuestionsCommon questions about Jiangmen’s climate

When is the best time to visit Jiangmen?

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

How hot does Jiangmen get?

In July, the warmest month, daily highs average 32 °C. About 115 days a year pass 30 °C. The highest value in the 1991–2020 record is 38 °C.

How cold does it get in winter?

Nights average 11 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Jiangmen?

June, averaging 307 mm over 23 days with rain. The driest month is January with 32 mm. The year as a whole averages 1,798 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 Jiangmen 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.