Harbin weather in September
In September, Harbin has an average high of 21 °C71 °F and an average low of 9 °C48 °F, with about 58 mm2.3 in of precipitation. It is the 4th warmest month of the year and ranks 5th for precipitation.
How September compares with other months
Compared with August, September is 6.4 °C11.6 °F cooler on average and drier by 58 mm2.3 in. Compared with October, September is 9.8 °C17.7 °F warmer on average and wetter by 34 mm1.3 in. Daylight lasts about 12.5 hours around the middle of the month. Average relative humidity is 68% and the average cloud amount 49%.
Is September a good time to visit Harbin?
Yes — September is one of the most comfortable months to visit Harbin by our comfort score, which favours average highs of 21–28 °C, lows above 5 °C, little rain and moderate humidity.
What to wear in September
For Harbin in September, pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
September in nearby places
Other months in Harbin
- January−14 °C7 °F / −24 °C−12 °F
- February−8 °C17 °F / −21 °C−5 °F
- March2 °C35 °F / −10 °C14 °F
- April13 °C55 °F / 0 °C31 °F
- May21 °C71 °F / 8 °C46 °F
- June27 °C81 °F / 15 °C58 °F
- July29 °C84 °F / 18 °C65 °F
- August27 °C80 °F / 16 °C61 °F
- September21 °C71 °F / 9 °C48 °F
- October11 °C52 °F / −1 °C31 °F
- November−1 °C29 °F / −11 °C13 °F
- December−12 °C10 °F / −21 °C−6 °F
Frequently asked questions
How warm is Harbin in September?
In September the average high in Harbin is 21 °C (71 °F) and the average low is 9 °C (48 °F).
Does it rain a lot in Harbin in September?
On average about 58 mm (2.3 in) of precipitation falls in September; it ranks 5th of the 12 months.
Is September the warmest month in Harbin?
No. The warmest month in Harbin is July, with an average high of 29 °C (84 °F). The coldest month is January, with an average low of -24 °C (-12 °F).
How long is the day in Harbin in September?
In the middle of September the day in Harbin lasts about 12.5 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Harbin in September?
The average relative humidity in September is about 68%. This is a long-term average for the whole day.
How cloudy is Harbin in September?
On average about 49% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.