Xiamen weather in September

In September, Xiamen sees average daytime highs of 30°C and overnight lows near 24°C, with 131 mm of rain across 12.3 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 36% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 30 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Xiamen's 5th-clearest and 7th-windiest month. For the whole year in context, see Xiamen's year-round climate.

Daytime high
30°
3rd warmest
Overnight low
24°
9th coldest
Rainfall
131 mm
12.3 wet days
Daylight
12 h 06 min
5:58 AM – 6:06 PM
Cloud cover
58%
5th clearest
Wind
10 km/h
7th windiest
Solar energy
4.76 kWh/m²
Travel score
4.7
out of 10

Xiamen is prefecture-level city in Fujian, China.

Air quality
High
PM2.5 25.2 µg/m³ · 2018
Density
2,717/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Xiamen reaches about 30°C in the afternoon and slips back to 24°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 33°C. Set against its neighbours, September runs about 1°C cooler than August and about 2°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13125
23125
33125
43125
53125
63125
73125
83125
93125
103125
113125
123025
133025
143025
153025
163024
173024
183024
193024
203024
213024
223024
233024
243024
253023
263023
272923
282923
292923
302923

How September really feels in Xiamen

Once humidity and wind are folded in, September averages 26 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
26
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Xiamen weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 10°405.610.76.4
Feb18° / 11°608.711.16.0
Mar20° / 14°8911.711.86.0
Apr24° / 18°10812.812.66.1
May28° / 22°18416.113.25.3
Jun30° / 25°24519.713.53.7
Jul31° / 26°18817.113.43.5
Aug31° / 26°25119.712.93.4
Sep30° / 24°13112.312.24.7
Oct28° / 21°443.811.47.3
Nov24° / 17°494.710.87.9
Dec20° / 12°42510.57.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 47%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24456
34555
44555
54654
64852
74951
84951
95149
105248
115347
125446
135446
145446
155545
165545
175545
185545
195446
205545
215545
225644
235644
245545
255644
265743
275743
285941
295941
306040

Chance of precipitation in September

Any precipitation

Xiamen gets around 131 mm of rain over 12.3 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 40% and peaks near 62% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
162
260
359
457
556
654
752
851
949
1047
1146
1244
1342
1441
1539
1638
1737
1836
1935
2034
2132
2231
2330
2429
2528
2627
2726
2825
2924
3023

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the miserable band about 38% of days. Sticky, muggy-or-worse air turns up on roughly 93% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10022573
20032770
30042967
40043066
50053263
60063460
70173557
80183754
90193852
1002103850
1102113948
1203133945
1303144043
1404164040
1505184038
1605204035
1706214033
1807234030
1907253928
2008273925
2119293923
2219303821
23110313819
24111323817
25212333815
26213333814
27314343812
28315343710
2941634379
3051734368

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
1310calm
1410calm
1510calm
1610calm
1710calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2412calm
2512calm
2612calm
2712light breeze
2812light breeze
2912light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 30 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over September. Sunrise moves from 5:52 AM to 6:03 AM, and sunset from 6:22 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:526:22
212.55:536:21
312.55:536:20
412.45:536:19
512.45:546:18
612.45:546:17
712.45:556:16
812.35:556:15
912.35:556:14
1012.35:566:13
1112.35:566:12
1212.25:566:11
1312.25:576:10
1412.25:576:08
1512.25:576:07
1612.15:586:06
1712.15:586:05
1812.15:586:04
1912.15:596:03
2012.05:596:02
2112.06:006:01
2212.06:006:00
2312.06:005:58
2411.96:015:57
2511.96:015:56
2611.96:015:55
2711.96:025:54
2811.86:025:53
2911.86:035:52
3011.86:035:51

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.76 kWh/m².

For context, solar energy here swings from a low near 3.12 kWh/m² to a high of 5.63 kWh/m² in July across the year — September's 4.76 kWh/m² sits near the top of that range.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.6Bright
304.6Bright
Planning a trip in September

Hazard calendar for Xiamen

In seasonPeak

In September, Xiamen sits inside its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.

Xiamen sits in the Pacific typhoon belt; the season peaks July–October.

Xiamen's monsoon runs May–September, when most of the year's rain falls.

Pacific typhoon
Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Xiamen?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.7
Sightseeing
9th-best month of the year
6.5
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Xiamen for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Xiamen in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Xiamen sees daytime highs around 30°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near Xiamen in September

The nearest coast averages about 27°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 28°C and coldest in February near 15°C.

It's comfortable for a long swim from Apr 20 to Nov 29 — about 7.4 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar17Cool
Apr20Cool
May23Refreshing
Jun26Warm
Jul27Warm
Aug28Warm
Sep27Warm
Oct25Warm
Nov22Refreshing
Dec18Cool

UV index in Xiamen in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Xiamen peaks around June 18 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 5 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJun 18UV 11Dec 21UV 5
UV index (midday)Level
Jan6High
Feb7High
Mar9Very high
Apr8Very high
May10Extreme
Jun12Extreme
Jul11Extreme
Aug10Extreme
Sep10Extreme
Oct8Very high
Nov6High
Dec5High

Air quality in Xiamen in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Xiamen is worst in January — around 33 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (July, 16 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Xiamen's WHO annual average of 25.2 µg/m³.

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJan 2033 µg/m³Jul 1517 µg/m³
PM2.5 (µg/m³)Level
Jan33Moderate
Feb32Moderate
Mar33Moderate
Apr29Moderate
May24Moderate
Jun18Moderate
Jul16Moderate
Aug19Moderate
Sep22Moderate
Oct21Moderate
Nov27Moderate
Dec28Moderate
Location & terrain

Where is Xiamen?

Xiamen sits at 24.5°N, 118.1°E, 12 m above sea level, in China. The nearest listed city is Jincheng, 24 km away.

Topography around Xiamen

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Xiamen.

Within 3 km, the terrain around Xiamen has only modest variations in elevation — a maximum elevation change of 213 m around an average of 19 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 460 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,439 m.

The land around Xiamen is covered by artificial surfaces (46%), water (31%) and trees (21%) within 3 km, water (46%) and artificial surfaces (26%) within 16 km, and trees (48%) and water (33%) within 80 km.

3 km
213 m
16 km
460 m
80 km
1,439 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Jincheng 24 km · Jinhu 35 km · Magong 184 km · Fuzhou 215 km · Erlin 241 km · Budai 244 km · Beigang 247 km · Erlun 249 km

China travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / I
220 V · 50 Hz
Prices
≈ 47% of US
price level, 2025
GDP per capita
$13,862
2025
Happiness
6.1 / 10
World Happiness, 2025
Homicide rate
0.5
per 100k, 2020
Road deaths
17.4
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 464
Religion
unaffiliated 52%folk religion 22%Buddhist 18%Christian 5%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Xiamen (24.4798°, 118.0819°, elevation 12 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).