Chongqing weather in September

In September, Chongqing sees average daytime highs of 28°C and overnight lows near 21°C, with 118 mm of rain across 12.4 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 31°C in the first days to 26°C by the end. The sky is clear or mostly clear about 25% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 36 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Chongqing's 2nd-clearest and 3rd-windiest month. For the whole year in context, see Chongqing's year-round climate.

Daytime high
28°
4th warmest
Overnight low
21°
9th coldest
Rainfall
118 mm
12.4 wet days
Daylight
12 h 12 min
6:43 AM – 6:53 PM
Cloud cover
68%
2nd clearest
Wind
6 km/h
3rd windiest
Solar energy
3.51 kWh/m²
Travel score
5.3
out of 10

Chongqing is administrative center of Chongqing municipality.

Air quality
Very high
PM2.5 37.2 µg/m³ · 2018
Founded
1929

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 31°C in the first days to 26°C by the end.

A typical September day in Chongqing reaches about 28°C in the afternoon and slips back to 21°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 34°C. Set against its neighbours, September runs about 5°C cooler than August and about 6°C warmer than October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13124
23123
33123
43023
53023
63023
73023
83022
92922
102922
112922
122922
132922
142822
152821
162821
172821
182821
192721
202721
212721
222720
232720
242620
252620
262620
272620
282620
292519
302519

How September really feels in Chongqing

Once humidity and wind are folded in, September averages 6 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
6
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.

Chongqing weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan11° / 287.610.32.5
Feb13° / 338.810.93.6
Mar18° / 11°7213.211.85.1
Apr23° / 16°1171512.75.7
May27° / 19°16316.113.55.5
Jun29° / 22°17315.713.94.6
Jul33° / 25°16614.613.73.1
Aug33° / 25°14714.213.13.1
Sep28° / 21°11812.412.25.3
Oct22° / 17°10716.311.35.5
Nov17° / 12°7211.610.54.9
Dec12° / 378.910.13.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 66%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13664
23763
33664
43565
53565
63664
73664
83664
93565
103664
113664
123664
133565
143565
153565
163565
173565
183466
193466
203367
213367
223367
233268
243268
253169
263070
273070
282971
292971
302872

Chance of precipitation in September

Any precipitation

Chongqing gets around 118 mm of rain over 12.4 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 43% and peaks near 47% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
141
241
341
441
541
641
741
841
941
1041
1142
1242
1342
1442
1542
1642
1742
1842
1943
2043
2143
2243
2344
2444
2544
2645
2745
2846
2946
3047

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 48% of days. Sticky, muggy-or-worse air turns up on roughly 73% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101641466
201642446
301744426
401845405
501946385
6011047365
7011148345
8011249325
9011450315
10021550295
11021650275
12021850264
13021951244
14032050234
15032251213
16032351203
17042450193
18042650182
19042751162
20052850161
21052950151
22053050141
23053149131
24063349120
25063448110
26173547100
2718364690
2819384480
29110394370
30111404160

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 36 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 54 minutes over September. Sunrise moves from 6:35 AM to 6:51 AM, and sunset from 7:12 PM to 6:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:357:12
212.66:357:11
312.66:367:10
412.56:367:09
512.56:377:07
612.56:377:06
712.46:387:05
812.46:397:04
912.46:397:02
1012.46:407:01
1112.36:407:00
1212.36:416:58
1312.36:416:57
1412.26:426:56
1512.26:426:55
1612.26:436:53
1712.16:436:52
1812.16:446:51
1912.16:446:49
2012.16:456:48
2112.06:466:47
2212.06:466:46
2312.06:476:44
2411.96:476:43
2511.96:486:42
2611.96:486:41
2711.86:496:39
2811.86:496:38
2911.86:506:37
3011.76:516:36

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.51 kWh/m².

For context, solar energy here swings from a low near 1.6 kWh/m² to a high of 5.22 kWh/m² in July across the year — September's 3.51 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.2Bright
34.2Bright
44.1Bright
54.0Bright
64.0Moderate
73.9Moderate
83.9Moderate
93.8Moderate
103.8Moderate
113.7Moderate
123.7Moderate
133.6Moderate
143.6Moderate
153.5Moderate
163.5Moderate
173.4Moderate
183.4Moderate
193.3Moderate
203.3Moderate
213.2Moderate
223.2Moderate
233.1Moderate
243.1Moderate
253.0Moderate
263.0Moderate
272.9Moderate
282.9Moderate
292.8Moderate
302.8Moderate
Planning a trip in September

Hazard calendar for Chongqing

In seasonPeak

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

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

Chongqing's rainy season runs April–October, when most of the year's rain falls.

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

Is September a good time to visit Chongqing?

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

5.3
Sightseeing
4th-best month of the year
6.0
Beach & pool
1st-best month of the year

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

What to pack for Chongqing in September

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

In September, Chongqing sees daytime highs around 28°C and nights near 21°C. Pack light clothes. Worth having: rain gear. About 12 days see rain.

light clothesrain gear

UV index in Chongqing in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Chongqing peaks around July 15 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highVery highExtremeVery highModerateJul 15UV 11Jan 10UV 3
UV index (midday)Level
Jan3Moderate
Feb6High
Mar8Very high
Apr6High
May9Very high
Jun9Very high
Jul11Extreme
Aug8Very high
Sep9Very high
Oct7High
Nov3Moderate
Dec3Moderate

Air quality in Chongqing 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 Chongqing is worst in January — around 49 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (August, 23 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Chongqing's WHO annual average of 37.2 µg/m³.

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorJan 1648 µg/m³Aug 1123 µg/m³
PM2.5 (µg/m³)Level
Jan49Poor
Feb45Poor
Mar43Poor
Apr37Poor
May35Poor
Jun30Moderate
Jul24Moderate
Aug23Moderate
Sep32Moderate
Oct39Poor
Nov44Poor
Dec46Poor
Location & terrain

Where is Chongqing?

Chongqing sits at 29.6°N, 106.6°E, 289 m above sea level, in China. The nearest listed city is Chengdu, 269 km away.

GuiyangFenghuangZhangjiajieXi'anGuilinKunming

Topography around Chongqing

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

Within 3 km, the terrain around Chongqing has only modest variations in elevation — a maximum elevation change of 206 m around an average of 227 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 504 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,549 m.

The land around Chongqing is covered by artificial surfaces (54%) and water (25%) within 3 km, trees (44%) and artificial surfaces (39%) within 16 km, and trees (73%) within 80 km.

3 km
206 m
16 km
504 m
80 km
1,549 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Chengdu 269 km · Leshan 270 km · Guiyang 331 km · Fenghuang 347 km · Zhangjiajie 383 km · Xi'an 568 km · Guilin 602 km · Kunming 630 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 Chongqing (29.5603°, 106.5577°, elevation 289 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). 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).