September is an ideal time to visit Surabaya if you're seeking a destination with brilliant weather. Anticipate average maximum temperatures of +32°C and about 9 sunny days, ensuring you'll have ample opportunities to soak up the sunshine. It's worth noting, though, that there may be some rainfall, with approximately 22 mm of precipitation over an average of 10 rainy days. So, prepare your sunglasses, a beach towel, and great walking shoes, as it's most likely going to be amazing weather. Search flightsin one click on Avionero.
Good to know:
September is usually the driest month of the year in Surabaya
Average weather
☀️
+32°C
Avg. max. temperature
+21°C
Min.
+36°C
Max.
22 mm
Total precipitation
68%
Avg. humidity
2 m/s
Avg. wind
9 ☀️
Sunny Days
10 ⛅️
Cloudy
10 🌦
Rainy
Our opinion: Surabaya has great weather in September.
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Average temperature in Surabaya in September
Here are the expected maximum, average and minimum temperatures in Surabaya for September based on the historical data.
Last Year
Historical Data
Going from a maximum of +33°C during the day to a minimum of +23°C during the night, the temperature in September averages around +32°C.
The average maximum temperature goes up 20% by the end of the month, compared with the beginning of the month, from +31°C to +33°C.
Is Surabaya warm or cold in September?
Surabaya is typically hot in September.
Maximum temperatures go up compared to the previous month from +31°C to +32°C. The minimum temperature also goes up from +24°C to +25°C.
Make sure that you pack your summer linen and swimming costumes; it’s probably going to be hot.
September is one of the warmest months in Surabaya, here is the comparison with other months:
Climate in Surabaya in September
Surabaya weather looks like this, on average, in September and the surrounding months.
August
September
October
Avg. temperature
+31°C
+32°C
+33°C
Min. temperature
+20°C
+21°C
+20°C
Max. temperature
+34°C
+36°C
+37°C
Rainfall
7 mm
22 mm
71 mm
Wind
2 m/s
2 m/s
2 m/s
Humidity
70%
68%
69%
Air pressure
1010 HPa
1010 HPa
1009 HPa
Sunny days
13
9
5
Cloudy days
11
10
5
Rainy days
7
10
19
Snowy days
0
0
0
September weather is still as great as in August.It’s getting warmer as September arrives. The average maximum temperature goes up from +31°C to +32°C during the day.Prepare for more rain. Average rainfall goes from 7 mm to 22 mm.It feels drier, as humidity decreases from 70% to 68%.The average wind speed doesn’t change much during September, staying around 2 m/s.The days becoming less sunny, going from 13 sunny days in August to 9 in September.
Next month (October) brings a further decline in the weather.
Wind speed in Surabaya in September based on historical data.
Last Year
Historical Data
The average wind speed is 3 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Surabaya is gradually increasing during September, going from 3 m/s to 3 m/s over the course of the month.
Rain
Amount of rainfall in mm during September in Surabaya based on historical data.
Last Year
Historical Data
Typically, there is a 3% chance of rain on an average day in September, with total rainfall of approximately 1 mm. The maximum amount of rainfall per day is around 1 mm, which is considered light rain.Surabaya is amazing in September with as little as 1 rainy days on average, so plan adventures in the great outdoors.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Surabaya wettest month is January, where a typical day has a 81% chance of precipitation and 261 mm of rainfall per day. August, on the other hand, is the driest month with a mere 23% chance of precipitation and 7 mm of rainfall per day.
How was the weather last September in Surabaya?
This is the weather in Surabaya in September 2024:
1 September
☀️
+31°C
2 September
☀️
+32°C
3 September
☀️
+32°C
4 September
☀️
+31°C
5 September
☀️
+32°C
6 September
☀️
+33°C
7 September
☀️
+32°C
8 September
☀️
+31°C
9 September
☀️
+31°C
10 September
☀️
+32°C
11 September
☀️
+33°C
12 September
☀️
+33°C
13 September
☀️
+33°C
14 September
☀️
+31°C
15 September
☀️
+32°C
16 September
☀️
+32°C
17 September
☀️
+32°C
18 September
☀️
+32°C
19 September
☀️
+32°C
20 September
☀️
+32°C
21 September
☀️
+32°C
22 September
☀️
+31°C
23 September
☀️
+33°C
24 September
☀️
+32°C
25 September
☀️
+32°C
26 September
☀️
+33°C
27 September
☀️
+33°C
28 September
☀️
+33°C
29 September
☀️
+32°C
30 September
☀️
+33°C
In September 2024 Surabaya had 30 sunny days, 0 cloudy days, and 0 rainy days. The average maximum temperature was +32°C, with an absolute maximum of +33°C and a minimum of +31°C. The average humidity was 66%, with a maximum of 89% and a minimum of 31%. The average wind speed was 3 m/s, with a maximum of 11 m/s and a minimum of 0 m/s.
Are you planning a trip in September?
Climate Change over Years
This is how Surabaya climate have been changing during last 43 years period.
The climate in Surabaya in September has not changed much over the last 43 years.
The average temperature was the lowest in 1984 (+30°C) and the highest in 2009 (+33°C). The driest year was 1997 with only 1067 mm of rainfall, and the wettest year was 2010 with 2524 mm.
FAQ
Frequently asked questions about the weather in Surabaya in September:
Is September a good time to visit Surabaya?
Yes, September is a great time to go to Surabaya, the weather couldn’t be better. Be ready to get outside, explore and enjoy. Check what other months that are a good time to visit Surabaya.
Can you sunbathe in Surabaya in September?
Absolutely, September is hot in Surabaya. Plan on beach and pool time, and ensure that you pack light and breathable options to stay comfortable.
Is Surabaya rainy in September?
Surabaya is usually dry in September. Plan your packing around outdoor activities and exploring.
Is it sunny in Surabaya in September?
Usually, it’s not very sunny in Surabaya in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
Other cities in Indonesia
Check out the weather for other cities in Indonesia.
For this page, we’ve looked at the typical weather in Surabaya, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
