Tianjin weather in September

In September, Tianjin sees average daytime highs of 27°C and overnight lows near 17°C, with 55 mm of rain across 6.4 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 24°C by the end. The sky is clear or mostly clear about 47% 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 Tianjin's 8th-clearest and 10th-windiest month. For the whole year in context, see Tianjin's year-round climate.

Daytime high
27°
5th warmest
Overnight low
17°
9th coldest
Rainfall
55 mm
6.4 wet days
Daylight
12 h 18 min
5:58 AM – 6:13 PM
Cloud cover
46%
8th clearest
Wind
9 km/h
10th windiest
Solar energy
4.57 kWh/m²
Travel score
7.1
out of 10
Air quality
Severe
PM2.5 60.2 µg/m³ · 2018

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 24°C by the end.

A typical September day in Tianjin reaches about 27°C in the afternoon and slips back to 17°C overnight — a 10°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)
12920
22920
32920
42920
52819
62819
72819
82819
92819
102818
112818
122718
132718
142717
152717
162717
172717
182617
192616
202616
212616
222616
232616
242515
252515
262515
272515
282414
292414
302414

How September really feels in Tianjin

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.

Tianjin 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 / -7°30.919.60.0
Feb / -4°61.4110.50.7
Mar13° / 102.40.511.74.5
Apr21° / 10°294.50.1137.5
May27° / 16°395.6014.17.0
Jun31° / 21°868.3014.74.8
Jul32° / 23°17513.3014.53.9
Aug30° / 22°13511.9013.54.6
Sep27° / 17°556.4012.37.1
Oct20° / 10°384.90117.3
Nov11° / 142.60.89.93.2
Dec / -5°41.10.99.30.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% 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
25941
35941
45941
55842
65941
75941
85941
95941
106040
116040
126040
136040
146040
156139
166139
176238
186238
196238
206337
216337
226436
236436
246535
256535
266535
276634
286634
296535
306535

Chance of precipitation in September

Any precipitation

Tianjin gets around 55 mm of rain over 6.4 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 22% and peaks near 26% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
126
226
325
425
524
623
723
822
922
1021
1121
1220
1320
1420
1520
1620
1720
1821
1921
2021
2121
2221
2321
2421
2521
2621
2721
2820
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 31% of days. Sticky, muggy-or-worse air turns up on roughly 21% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
17132235212
28152334192
310162432172
411172531151
512182629131
613192827121
714202926101
81620302581
91721302371
101921312261
112122312051
122322311941
132622321730
142723311620
152923311420
163123311310
173323311210
183523301110
193723291010
20392328900
21412327800
22432326700
23462325600
24482323600
25502322500
26532320400
27542319400
28572317300
29592216300
30612215200

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 5:44 AM to 6:11 AM, and sunset from 6:38 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:446:38
212.95:456:36
312.85:466:35
412.85:476:33
512.75:486:31
612.75:496:30
712.65:506:28
812.65:516:27
912.65:526:25
1012.55:526:23
1112.55:536:22
1212.45:546:20
1312.45:556:18
1412.35:566:17
1512.35:576:15
1612.35:586:13
1712.25:596:11
1812.26:006:10
1912.16:016:08
2012.16:026:06
2112.06:036:05
2212.06:046:03
2311.96:056:01
2411.96:066:00
2511.96:075:58
2611.86:085:56
2711.86:095:55
2811.76:095:53
2911.76:105:51
3011.66:115:50

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.57 kWh/m².

For context, solar energy here swings from a low near 2.31 kWh/m² to a high of 6.18 kWh/m² in May across the year — September's 4.57 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.5Bright
174.5Bright
184.5Bright
194.5Bright
204.5Bright
214.4Bright
224.4Bright
234.4Bright
244.4Bright
254.3Bright
264.3Bright
274.3Bright
284.2Bright
294.2Bright
304.2Bright
Planning a trip in September

Hazard calendar for Tianjin

In seasonPeak

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

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

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

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

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

Is September a good time to visit Tianjin?

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

7.1
Sightseeing
3rd-best month of the year
7.2
Beach & pool
2nd-best month of the year

September is one of the better times to visit Tianjin for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Tianjin in September

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

In September, Tianjin sees daytime highs around 27°C and nights near 17°C. Worth packing: light clothes and sun protection. About 6 days see rain.

light clothessun protection

Sea temperature near Tianjin in September

The nearest coast averages about 23°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 49 km away) is warmest in August at about 26°C and coldest in February near 2°C.

It's comfortable for a long swim from Jun 9 to Oct 4 — about 3.9 months when the water holds above 20°C.

0°10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan3Bracing
Feb2Bracing
Mar4Bracing
Apr10Bracing
May16Cool
Jun21Refreshing
Jul25Warm
Aug26Warm
Sep23Refreshing
Oct18Cool
Nov12Bracing
Dec7Bracing

UV index in Tianjin in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tianjin peaks around July 23 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighVery highModerateLowJul 23UV 7Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr6High
May7Very high
Jun7High
Jul8Very high
Aug7Very high
Sep7High
Oct4Moderate
Nov2Low
Dec2Low

Air quality in Tianjin 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 Tianjin is worst in January — around 88 µg/m³ PM2.5 (unhealthy), about 2.3× the cleanest month (July, 38 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Tianjin's WHO annual average of 60.2 µg/m³.

0306090JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyJan 988 µg/m³Jul 1538 µg/m³
PM2.5 (µg/m³)Level
Jan88Unhealthy
Feb78Unhealthy
Mar70Unhealthy
Apr50Poor
May43Poor
Jun40Poor
Jul38Poor
Aug40Poor
Sep48Poor
Oct64Unhealthy
Nov76Unhealthy
Dec88Unhealthy
Location & terrain

Where is Tianjin?

Tianjin sits at 39.1°N, 117.2°E, 11 m above sea level, in China. The nearest listed city is Beijing, 108 km away.

DatongDalianQingdaoZhengzhouSinŭiju

Topography around Tianjin

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

Within 3 km, the terrain around Tianjin has only modest variations in elevation — a maximum elevation change of 31 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 54 m; within 80 km, only modest variations in elevation — a maximum elevation change of 63 m.

The land around Tianjin is covered by artificial surfaces (86%) within 3 km, artificial surfaces (59%) and cropland (26%) within 16 km, and cropland (58%) within 80 km.

3 km
31 m
16 km
54 m
80 km
63 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Beijing 108 km · Chengde 212 km · Jinan 276 km · Datong 349 km · Dalian 383 km · Qingdao 443 km · Zhengzhou 580 km · Sinŭiju 627 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 Tianjin (39.1422°, 117.1767°, elevation 11 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).