Harbin weather in September

In September, Harbin sees average daytime highs of 21°C and overnight lows near 10°C, with 67 mm of rain across 8.5 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 18°C by the end. The sky is clear or mostly clear about 42% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Harbin's 5th-clearest and 7th-windiest month. For the whole year in context, see Harbin's year-round climate.

Daytime high
21°
4th warmest
Overnight low
10°
9th coldest
Rainfall
67 mm
8.5 wet days
Daylight
12 h 18 min
5:18 AM – 5:37 PM
Cloud cover
49%
5th clearest
Wind
13 km/h
7th windiest
Solar energy
4.2 kWh/m²
Travel score
6.8
out of 10

Harbin is capital of Heilongjiang province, China.

Air quality
Very high
PM2.5 43.2 µg/m³ · 2018
Density
99/km²
people per km²
Founded
1898

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 24°C in the first days to 18°C by the end.

A typical September day in Harbin reaches about 21°C in the afternoon and slips back to 10°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 26°C. Set against its neighbours, September runs about 5°C cooler than August and about 9°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12414
22414
32413
42313
52313
62312
72312
82312
92312
102211
112211
122211
132210
142210
152110
162110
17219
18219
19209
20209
21208
22208
23208
24198
25197
26197
27197
28187
29186
30186

How September really feels in Harbin

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.

Harbin weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-13° / -23°41.31.68.90.0
Feb-7° / -18°61.7210.10.0
Mar / -8°153.62.711.60.3
Apr13° / 305.60.613.34.0
May21° / 659.30.114.76.5
Jun26° / 16°9912.2015.46.2
Jul28° / 19°15514.9015.15.7
Aug26° / 17°13813.5013.96.1
Sep21° / 10°678.5012.36.8
Oct12° / 386.50.710.73.7
Nov-0° / -10°183.62.89.30.0
Dec-10° / -20°92.42.98.50.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 42%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25545
35545
45545
55644
65644
75644
85743
95743
105743
115842
125842
135842
145842
155941
165941
175941
186040
196040
206040
216040
225941
236040
246040
256040
266139
276139
286139
296238
306238

Chance of precipitation in September

Any precipitation

Harbin gets around 67 mm of rain over 8.5 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 29% and peaks near 36% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
136
236
335
434
533
632
731
831
930
1029
1129
1228
1328
1427
1527
1626
1726
1826
1926
2026
2126
2227
2327
2427
2527
2627
2727
2827
2927
3027

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 75% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
135262811
238262610
34126249
44525228
54825207
65125186
75524165
85923144
96322123
106521113
11692092
12721972
13751861
14771751
15801541
16831430
17851320
18871120
19891010
2090910
2191810
2292710
2393610
2495500
2595500
2696400
2796400
2897300
2997300
3097300

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 96 minutes over September. Sunrise moves from 4:59 AM to 5:36 AM, and sunset from 6:07 PM to 5:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.14:596:07
213.15:006:05
313.05:026:03
413.05:036:01
512.95:045:59
612.95:055:57
712.85:075:55
812.85:085:53
912.75:095:51
1012.65:115:49
1112.65:125:47
1212.55:135:45
1312.55:145:43
1412.45:165:41
1512.45:175:39
1612.35:185:37
1712.35:195:35
1812.25:215:33
1912.25:225:31
2012.15:235:29
2112.05:255:27
2212.05:265:25
2311.95:275:23
2411.95:295:21
2511.85:305:19
2611.85:315:17
2711.75:325:15
2811.75:345:13
2911.65:355:11
3011.55:365:09

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.2 kWh/m².

For context, solar energy here swings from a low near 1.7 kWh/m² to a high of 5.91 kWh/m² in June across the year — September's 4.2 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.2Bright
174.2Bright
184.2Bright
194.1Bright
204.1Bright
214.0Bright
224.0Bright
234.0Moderate
243.9Moderate
253.9Moderate
263.8Moderate
273.8Moderate
283.8Moderate
293.7Moderate
303.7Moderate
Planning a trip in September

Hazard calendar for Harbin

In seasonPeak

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

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

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

Is September a good time to visit Harbin?

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

6.8
Sightseeing
1st-best month of the year
4.1
Beach & pool
4th-best month of the year

September is a reasonable time to visit Harbin for sightseeing.

What to pack for Harbin in September

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

In September, Harbin sees daytime highs around 21°C and nights near 10°C. Worth packing: rain gear. About 9 days see rain.

rain gear

UV index in Harbin in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Harbin peaks around August 16 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 19 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighModerateLowAug 16UV 7Dec 19UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr4Moderate
May5Moderate
Jun6High
Jul6High
Aug7Very high
Sep5High
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Harbin 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 Harbin is worst in January — around 62 µg/m³ PM2.5 (unhealthy), about 2.1× the cleanest month (August, 29 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Harbin's WHO annual average of 43.2 µg/m³.

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorJan 2062 µg/m³Aug 1730 µg/m³
PM2.5 (µg/m³)Level
Jan62Unhealthy
Feb58Unhealthy
Mar58Unhealthy
Apr45Poor
May33Moderate
Jun33Moderate
Jul33Moderate
Aug29Moderate
Sep32Moderate
Oct37Poor
Nov46Poor
Dec51Poor
Location & terrain

Where is Harbin?

Harbin sits at 45.8°N, 126.7°E, 140 m above sea level, in China. The nearest listed city is Hainan, 167 km away.

Namyang-nodongjaguNamyangOnsŏngMusan-ŭpChunggangHoeryŏngSamjiyŏn-ŭp

Topography around Harbin

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

Within 3 km, the terrain around Harbin has only modest variations in elevation — a maximum elevation change of 45 m around an average of 139 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 95 m; within 80 km, large variations in elevation — a maximum elevation change of 727 m.

The land around Harbin is covered by artificial surfaces (91%) within 3 km, artificial surfaces (44%) and cropland (24%) within 16 km, and cropland (76%) within 80 km.

3 km
45 m
16 km
95 m
80 km
727 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Hainan 167 km · Namyang-nodongjagu 402 km · Namyang 402 km · Onsŏng 409 km · Musan-ŭp 442 km · Chunggang 442 km · Hoeryŏng 443 km · Samjiyŏn-ŭp 459 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 Harbin (45.75°, 126.65°, elevation 140 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).