East Java

East Java Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in East Java, Indonesia in September.

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Surabaya Malang Batu Banyuwangi

Planning a trip to East Java, Indonesia this September? Here's what you need to know about the weather:

What to Expect in East Java in September

East Java, Indonesia is a region in Indonesia. September in East Java generally has temperatures that range from warm to very warm, with precipitation levels ranging from low to moderate.

Temperatures

The average maximum daytime temperatures vary from warm in Banyuwangi at 28°C (82°F) to very warm in Sidoarjo at 34°C (93°F). Nighttime temperatures generally drop to 24°C (75°F) in Sidoarjo and 22°C (72°F) in Banyuwangi. The temperatures mentioned for both day and night are typical averages. However some days might get even hotter. It's best to stay prepared by wearing cloths suitable for the warmth.

To learn more about the conditions in specific areas of East Java, Indonesia, check out the map below.

Precipitation

In September, precipitation varies across different areas. From low rainfall in Sumenep with an average of 12 mm (0.5 in) to moderate rainfall in Jember with 69 mm (2.7 in).

Average sunshine

Most destinations offer generous amounts of sunshine this September. For example, Surabaya gets approximately 229 hours of sunlight, perfect for anyone wanting bright, sunny days.

Explore East Java by month

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

Best Places to Visit in East Java in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across East Java.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in East Java

What is the weather like in September for some of the most popular destinations in East Java, Indonesia?

Temperature range in East Java (September)

Precipitation variation in East Java (September)

Surabaya

In September Surabaya generally has very high temperatures with maximum daytime temperatures around 34°C (93°F), minimum nighttime temperatures around 25°C (77°F) and low monthly rainfall. So on average the conditions are pleasant that month.

« August
September
October »
August
September
October
Max temperature
33°C (91°F)
34°C (93°F)
35°C (95°F)
Min temperature
24°C (75°F)
25°C (77°F)
26°C (79°F)
Monthly sun hours
247 hours
229 hours
221 hours
Monthly rainfall
8.8 mm (0.3 in)
22 mm (0.9 in)
74 mm (2.9 in)
Monthly rainy days
a single day
a single day
2 days
Weather conditions
perfect
pleasant
unpleasant
Climate in Surabaya →

Malang

In September Malang generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 17°C (63°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
27°C (81°F)
28°C (82°F)
29°C (84°F)
Min temperature
16°C (61°F)
17°C (63°F)
18°C (64°F)
Monthly rainfall
29 mm (1.1 in)
53 mm (2.1 in)
131 mm (5.2 in)
Monthly rainy days
3 days
4 days
4 days
Weather conditions
perfect
perfect
pleasant
Climate in Malang →

Batu

In September Batu generally has high temperatures with maximum daytime temperatures around 29°C (84°F), minimum nighttime temperatures around 18°C (64°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
28°C (82°F)
29°C (84°F)
29°C (84°F)
Min temperature
17°C (63°F)
18°C (64°F)
19°C (66°F)
Monthly rainfall
35 mm (1.4 in)
58 mm (2.3 in)
148 mm (5.8 in)
Monthly rainy days
5 days
5 days
6 days
Weather conditions
perfect
perfect
pleasant
Climate in Batu →

Banyuwangi

In September Banyuwangi generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 22°C (72°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
27°C (81°F)
28°C (82°F)
29°C (84°F)
Min temperature
21°C (70°F)
22°C (72°F)
23°C (73°F)
Monthly sun hours
221 hours
200 hours
222 hours
Monthly rainfall
27 mm (1.1 in)
37 mm (1.5 in)
68 mm (2.7 in)
Monthly rainy days
a single day
a single day
3 days
Weather conditions
perfect
perfect
perfect
Climate in Banyuwangi →

Kediri

In September Kediri generally has very high temperatures with maximum daytime temperatures around 32°C (90°F), minimum nighttime temperatures around 21°C (70°F) and low monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
31°C (88°F)
32°C (90°F)
32°C (90°F)
Min temperature
20°C (68°F)
21°C (70°F)
22°C (72°F)
Monthly rainfall
16 mm (0.6 in)
29 mm (1.1 in)
84 mm (3.3 in)
Monthly rainy days
2 days
2 days
4 days
Weather conditions
perfect
perfect
pleasant
Climate in Kediri →

Is your destination not in the list? Have a look at all destinations in East Java, in Indonesia.

In our records: Indonesia September extremes

Notable September records observed across cities in Indonesia in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • In our records, the coldest September daytime high in Indonesia was 18°C (64°F) in Bandung on September 23, 2003.

Popular cities in September

Day & night temperatures, rainfall and average weather in East Java in September.

City Weather Day temp Night temp Rainfall
Surabaya 34°C (93°F) 25°C (77°F) 22 mm (0.9 in)
Malang 28°C (82°F) 17°C (63°F) 53 mm (2.1 in)
Batu 29°C (84°F) 18°C (64°F) 58 mm (2.3 in)
Banyuwangi 28°C (82°F) 22°C (72°F) 37 mm (1.5 in)
Kediri 32°C (90°F) 21°C (70°F) 29 mm (1.1 in)
Kalibaru 29°C (84°F) 19°C (66°F) 63 mm (2.5 in)

East Java weather in September: frequently asked questions

What is the weather like in East Java, Indonesia in September?

East Java, Indonesia typically experiences poor weather in September, part of the season. Daytime highs in Surabaya average around 34°C (93°F), and temperatures drop to about 25°C (77°F) at night.

What is the average temperature in East Java, Indonesia in September?

Average temperatures in East Java, Indonesia during September range from a nighttime low near 25°C (77°F) to a daytime high around 34°C (93°F) in Surabaya.

Does East Java, Indonesia get a lot of rain in September?

September is on the drier side in East Java, Indonesia. Surabaya averages only about 22 mm (0.9 in), with most days staying dry.

Is September a Good Time to Visit East Java, Indonesia?

Given the typically pleasant weather conditions in Surabaya, September may not be the ideal time to visit East Java, Indonesia.

On average, the best time to visit East Java, Indonesia is in July and August with generally tolerable weather in Surabaya. In contrast, January, February, March, April, September, October, November and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in East Java.

Weather and climate has detailed information for every country in the world. Are you going to Indonesia? Get detailed historical weather averages for many cities in Indonesia.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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