Huaian weather in September
In September, Huaian has an average high of 27 °C81 °F and an average low of 18 °C65 °F, with about 90 mm3.5 in of precipitation. It is the 4th warmest month of the year and ranks 4th for precipitation.
How September compares with other months
Compared with August, September is 4.5 °C8.2 °F cooler on average and drier by 93 mm3.7 in. Compared with October, September is 5.9 °C10.7 °F warmer on average and wetter by 43 mm1.7 in. Daylight lasts about 12.3 hours around the middle of the month. Average relative humidity is 76% and the average cloud amount 63%.
Is September a good time to visit Huaian?
Yes — September is one of the most comfortable months to visit Huaian 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 Huaian in September, pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
September in nearby places
Other months in Huaian
- January5 °C41 °F / −3 °C26 °F
- February8 °C47 °F / −1 °C30 °F
- March15 °C58 °F / 3 °C38 °F
- April21 °C70 °F / 9 °C49 °F
- May27 °C80 °F / 16 °C60 °F
- June30 °C86 °F / 20 °C69 °F
- July31 °C89 °F / 24 °C76 °F
- August31 °C87 °F / 24 °C75 °F
- September27 °C81 °F / 18 °C65 °F
- October22 °C71 °F / 12 °C53 °F
- November14 °C58 °F / 5 °C41 °F
- December7 °C45 °F / −2 °C29 °F
Frequently asked questions
How warm is Huaian in September?
In September the average high in Huaian is 27 °C (81 °F) and the average low is 18 °C (65 °F).
Does it rain a lot in Huaian in September?
On average about 90 mm (3.5 in) of precipitation falls in September; it ranks 4th of the 12 months.
Is September the warmest month in Huaian?
No. The warmest month in Huaian is July, with an average high of 31 °C (89 °F). The coldest month is January, with an average low of -3 °C (26 °F).
How long is the day in Huaian in September?
In the middle of September the day in Huaian lasts about 12.3 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Huaian in September?
The average relative humidity in September is about 76%. Combined with warm days, it can feel muggy.
How cloudy is Huaian in September?
On average about 63% 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.