Haiphong weather in September
In September, Haiphong has an average high of 30 °C87 °F and an average low of 25 °C77 °F, with about 240 mm9.4 in of precipitation. It is the 4th warmest month of the year and ranks 3rd for precipitation.
How September compares with other months
Compared with August, September is 0.9 °C1.6 °F cooler on average and drier by 98 mm3.9 in. Compared with October, September is 2.6 °C4.6 °F warmer on average and wetter by 118 mm4.6 in. Daylight lasts about 12.2 hours around the middle of the month. Average relative humidity is 83% and the average cloud amount 73%.
Is September a good time to visit Haiphong?
September is not among the most comfortable months by our comfort score: it is hot (average high 30 °C87 °F), it is fairly wet (240 mm9.4 in) and it is humid (83%). The most comfortable months in Haiphong are November–March.
What to wear in September
For Haiphong in September, pack very light, breathable clothing, a sun hat and plenty of water and a good rain jacket or umbrella and quick-drying shoes.
September in nearby places
Other months in Haiphong
- January20 °C68 °F / 12 °C54 °F
- February22 °C72 °F / 14 °C58 °F
- March25 °C77 °F / 17 °C63 °F
- April28 °C83 °F / 21 °C70 °F
- May30 °C87 °F / 25 °C76 °F
- June31 °C88 °F / 27 °C80 °F
- July31 °C88 °F / 27 °C80 °F
- August31 °C87 °F / 26 °C79 °F
- September30 °C87 °F / 25 °C77 °F
- October28 °C83 °F / 22 °C71 °F
- November25 °C78 °F / 18 °C65 °F
- December21 °C70 °F / 14 °C56 °F
Frequently asked questions
How warm is Haiphong in September?
In September the average high in Haiphong is 30 °C (87 °F) and the average low is 25 °C (77 °F).
Does it rain a lot in Haiphong in September?
On average about 240 mm (9.4 in) of precipitation falls in September; it ranks 3rd of the 12 months.
Is September the warmest month in Haiphong?
No. The warmest month in Haiphong is June, with an average high of 31 °C (88 °F). The coldest month is January, with an average low of 12 °C (54 °F).
How long is the day in Haiphong in September?
In the middle of September the day in Haiphong lasts about 12.2 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Haiphong in September?
The average relative humidity in September is about 83%. Combined with warm days, it can feel muggy.
How cloudy is Haiphong in September?
On average about 73% 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.
The grid cell’s average elevation is 100 m, while Haiphong lies at about 12 m. Temperatures on this page were therefore adjusted by +0.6 °C1 °F using the standard lapse rate of 6.5 °C per 1,000 m.