East Java - Indonesia weather in September 2025
East Java - Indonesia weather in September 2025
Day
31 °C
Night
21 °C
Sea
27 °C
Precipitation
42 mm
in month
Rainy days
4 days
in month
Daylight
12 hours
average
Sunshine
9 hours
average
Humidity
73 %
Day
31 °C
Night
21 °C
Sea
27 °C
Precipitation
42 mm
in month
Rainy days
4 days
in month
Daylight
12 hours
average
Sunshine
9 hours
average
Humidity
73 %
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Weather overview and FAQs
Weather overview
In September in East Java, the average air temperature ranges from 31 °C (89 °F) during the day to 21 °C (70 °F) at night. There are 4 days of rain on average, where the rainfall is 42 mm (1.64 in).
Are there good conditions to visit in East Java in September?
In East Java in September, there are ideal conditions for a vacation. The daily temperatures in this month reach pleasant 31 °C (89 °F). The temperature of the sea will be perfect at 27 °C (81 °F). At night, temperatures hover around a pleasant 21 °C (70 °F). You can expect just 4 days of rain during the month, taking an umbrella is not necessary.
What temperature can I expect during the day in September in East Java?
In East Java in September, the average daily temperatures will be 31 °C (89 °F). The great temperature for lying by the sea or pool and sunbathing, everywhere else you will probably be a bit hot. Don't forget to drink during the day, in these temperatures you should hydrate yourself a lot.
What is the sea temperature in September in East Java?
The temperature of the sea in East Java in September is 27 °C (81 °F). Seems like an ideal temperature for swimming, you can stay in the sea for a long time and enjoy it as well.
How many days of precipitation on average can I expect in September in East Java?
There are 4 days, which are rainy in September in East Java, that is, days with precipitation more than 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 1.0 days of the week, or in general - 14 % days.
What is the air temperature in September in East Java at night?
The average night temperature in East Java in September is 21 °C (70 °F). A very pleasant temperature for long evening walks, fun over a drink outside, or doing sports in the morning. If possible, look for a hotel with air conditioning.
How humid is East Java in September?
In September in East Java, expect humidity around 73 %.
How many hours of sun to expect in September in East Java?
There is an average length of sunshine of 9 hours per day in September in East Java.
Is September part of the dry season in East Java?
Yes, there is a dry season in East Java in September with just 4 days during the month being rainy.
Is it hot in September in East Java?
In East Java in September, you will enjoy nice warm weather, but it will also be pleasant and you probably won't feel hot.
How long is the day (from dawn till dusk) in East Java in September?
The length of daylight in East Java in September is 12 hours.
Is East Java rainier in September than in August?
Yes, East Java is a rainier September than in August.
Is the sea in East Java warmer in September than in August?
No, the sea temperature in East Java in September is not higher than in August.