Climate averages 1991–2020

Jiangmen weather
in September.

A hot, very wet month: the 4th warmest and the 8th driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 30.3°C Daytime mean, September

Average low 24.2°C Night-time mean, September

Rainfall 210 mm 18 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

September is a hot month in Jiangmen: daytime highs average 30.3°C and nights cool to about 24.2°C. By daytime temperature it is the 4th warmest of the 12 months.

Expect about 210 mm of rain on roughly 18 days, which makes September a very wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 18 min on an average September day.

The nearest other city in this atlas is Shaping (24 km away). In September its highs average 30.3°C, about as warm as Jiangmen, with 188 mm of rain.

Among the 884 cities listed in China, Jiangmen ranks joint 16th of 884 for the warmest September highs and joint 854th of 884 for the driest September (rainfall, lowest first). The mean September high of those 884 cities is 25.7°C; Jiangmen is 4.7°C warmer than that mean.

From September to October, average highs fall by 2.1°C to 28.2°C, and monthly rainfall falls from 210 mm to 71 mm.

The annual picture

September in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Jiangmen climate table

1991–2020

Monthly climate averages for Jiangmen, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	19.2°C11.2°C	11.2°C	32	5.4	10.911 h
February	20.8°C13.2°C	13.2°C	42	7.8	11.411 h
March	23.9°C16.4°C	16.4°C	86	12.7	12.012 h
April	27.2°C20.4°C	20.4°C	164	15.7	12.713 h
May	29.5°C23.4°C	23.4°C	269	21.6	13.213 h
June	30.8°C25.4°C	25.4°C	303	22.7	13.513 h
July	31.6°C25.8°C	25.8°C	233	21.9	13.413 h
August	31.4°C25.6°C	25.6°C	283	24.0	12.913 h
September, selected	30.3°C24.2°C	24.2°C	210	17.6	12.312 h
October	28.2°C20.9°C	20.9°C	71	7.9	11.612 h
November	24.8°C16.7°C	16.7°C	35	5.6	11.111 h
December	20.4°C12.2°C	12.2°C	33	4.3	10.811 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

September in nearby cities

Distance from Jiangmen

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Jiangmen) is explained once on the Jiangmen year overview and on the Sources, method and limits page.