Beijing weather in September

In September, Beijing sees average daytime highs of 27°C and overnight lows near 16°C, with 57 mm of rain across 7.1 wet days and about 12.3 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 29°C in the first days to 25°C by the end. The sky is clear or mostly clear about 49% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Beijing's 8th-clearest and 10th-windiest month. For the whole year in context, see Beijing's year-round climate.

Daytime high
27°
5th warmest
Overnight low
16°
9th coldest
Rainfall
57 mm
7.1 wet days
Daylight
12 h 18 min
6:01 AM – 6:16 PM
Cloud cover
46%
8th clearest
Wind
7 km/h
10th windiest
Solar energy
4.48 kWh/m²
Travel score
6.9
out of 10

Beijing is capital city of China.

Air quality
Very high
PM2.5 50.6 µg/m³ · 2018
Density
1,155/km²
people per km²
Founded
1403

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 29°C in the first days to 25°C by the end.

A typical September day in Beijing reaches about 27°C in the afternoon and slips back to 16°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 31°C. Set against its neighbours, September runs about 4°C cooler than August and about 7°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
13019
23019
32919
42918
52918
62918
72918
82917
92817
102817
112817
122817
132816
142716
152716
162716
172715
182715
192715
202615
212614
222614
232614
242614
252514
262513
272513
282513
292413
302412

How September really feels in Beijing

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Beijing weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -8°30.80.99.50.0
Feb / -5°51.31.110.40.8
Mar13° / 92.30.611.74.7
Apr22° / 193.90.1137.8
May29° / 15°355014.26.4
Jun32° / 20°747.8014.84.0
Jul32° / 23°16012.8014.53.5
Aug31° / 22°11910.5013.64.4
Sep27° / 16°577.1012.36.9
Oct20° / 334.3010.97.4
Nov10° / -1°142.10.99.83.1
Dec / -6°311.19.20.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 38%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25842
35842
45941
55842
65941
75941
85941
96040
106040
116040
126040
136040
146040
156139
166139
176139
186139
196238
206238
216337
226436
236436
246535
256535
266634
276634
286634
296634
306733

Chance of precipitation in September

Any precipitation

Beijing gets around 57 mm of rain over 7.1 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 24% and peaks near 28% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
128
228
328
427
527
627
726
826
925
1025
1124
1224
1324
1423
1523
1623
1723
1822
1922
2022
2122
2222
2322
2422
2522
2621
2721
2821
2920
3020

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 41% of days. Sticky, muggy-or-worse air turns up on roughly 13% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
113172831101
21418282991
31619292881
41721292670
51922292460
62023292250
72225282050
82426281840
92627281730
102827271520
113028261420
123328251220
133529241110
143729231010
15402922810
16422921710
17442921600
18462820500
19482819500
20512718400
21532717300
22542716300
23572615200
24592613200
25622512100
26642411100
27652410100
2868239000
2970228000
3072217000

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 5:46 AM to 6:15 AM, and sunset from 6:42 PM to 5:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:466:42
212.95:476:40
312.85:486:39
412.85:496:37
512.75:506:35
612.75:516:34
712.75:526:32
812.65:536:30
912.65:546:28
1012.55:556:27
1112.55:566:25
1212.45:576:23
1312.45:586:22
1412.35:596:20
1512.36:006:18
1612.36:016:16
1712.26:026:15
1812.26:036:13
1912.16:046:11
2012.16:056:10
2112.06:066:08
2212.06:076:06
2311.96:086:04
2411.96:096:03
2511.96:106:01
2611.86:115:59
2711.86:125:58
2811.76:135:56
2911.76:145:54
3011.66:155:53

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.48 kWh/m².

For context, solar energy here swings from a low near 2.26 kWh/m² to a high of 6.12 kWh/m² in May across the year — September's 4.48 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.5Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.2Bright
274.2Bright
284.2Bright
294.1Bright
304.1Bright
Planning a trip in September

Hazard calendar for Beijing

In seasonPeak

None of Beijing's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Beijing's rainy season runs June–August, when most of the year's rain falls.

Beijing sees seasonal dust haze (April–June), heaviest in May.

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

Is September a good time to visit Beijing?

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

6.9
Sightseeing
3rd-best month of the year
7.2
Beach & pool
2nd-best month of the year

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

What to pack for Beijing in September

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

In September, Beijing sees daytime highs around 27°C and nights near 16°C. Pack light clothes. About 7 days see rain.

light clothes

UV index in Beijing in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Beijing peaks around June 11 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 21 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 11UV 7Dec 21UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar3Moderate
Apr6High
May7High
Jun7Very high
Jul6High
Aug5High
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Beijing 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 Beijing is worst in January — around 69 µg/m³ PM2.5 (unhealthy), about 2.0× the cleanest month (June, 34 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Beijing's WHO annual average of 50.6 µg/m³.

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyJan 1168 µg/m³Jun 1734 µg/m³
PM2.5 (µg/m³)Level
Jan69Unhealthy
Feb63Unhealthy
Mar57Unhealthy
Apr41Poor
May35Poor
Jun34Moderate
Jul35Moderate
Aug37Poor
Sep46Poor
Oct57Unhealthy
Nov67Unhealthy
Dec67Unhealthy
Location & terrain

Where is Beijing?

Beijing sits at 39.9°N, 116.4°E, 49 m above sea level, in China. The nearest listed city is Tianjin, 108 km away.

JinanDalianQingdaoZhengzhouSongyang

Topography around Beijing

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

Within 3 km, the terrain around Beijing has only modest variations in elevation — a maximum elevation change of 51 m around an average of 48 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 107 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,093 m.

The land around Beijing is covered by artificial surfaces (82%) within 3 km, artificial surfaces (70%) and trees (21%) within 16 km, and cropland (35%), trees (34%) and artificial surfaces (21%) within 80 km.

3 km
51 m
16 km
107 m
80 km
2,093 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Tianjin 108 km · Chengde 176 km · Datong 265 km · Jinan 364 km · Dalian 461 km · Qingdao 552 km · Zhengzhou 622 km · Songyang 675 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 Beijing (39.9075°, 116.3972°, elevation 49 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. 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).