Borneo weather in September 2026

Q: How hot is it in Borneo in September?

Daytime temperatures usually reach 31°C in Kota Kinabalu, Borneo in September with high heat and humidity, falling to 23°C at night.

Q: How sunny is it in Borneo in September?

There are normally 6 hours of bright sunshine each day in Kota Kinabalu, Borneo in September - that's 50% of daylight hours.

Q: How warm is the sea around Borneo in September?

The average sea temperature around Kota Kinabalu, Borneo in September is 29°C.

Q: Does it rain in Borneo in September?

There are usually 22 days with some rain in Kota Kinabalu, Borneo in September and the average monthly rainfall is 290mm.

Expect daytime maximum temperatures of 31°C in Borneo in September and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 22 days with some rainfall and typically 290 mm of rainfall in the month.

31
31°C max day temperature
6
6 hours of sunshine per day
22
22 days with some rainfall
23
23°C min night temperature
12
12 hours of daylight per day
H
High heat & humidity
290
290 mm of monthly rainfall
11
11+ (Extreme) UV index
29
29°C sea temperature

More about Borneo

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The September weather guide for Borneo (Kota Kinabalu) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Borneo temperatures in September

Below are average maximum temperatures at popular countries, regions and places in Borneo in September. Select a holiday destination to see more weather parameters.

How hot is it in Borneo in September?

Daytime temperatures usually reach 31°C in Kota Kinabalu, Borneo in September with high heat and humidity, falling to 23°C at night.

How sunny is it in Borneo in September?

There are normally 6 hours of bright sunshine each day in Kota Kinabalu, Borneo in September - that's 50% of daylight hours.

How warm is the sea around Borneo in September?

The average sea temperature around Kota Kinabalu, Borneo in September is 29°C.

Does it rain in Borneo in September?

There are usually 22 days with some rain in Kota Kinabalu, Borneo in September and the average monthly rainfall is 290mm.

Borneo September sunrise & sunset times

Browse the sunrise and sunset times for Borneo in September 2026. Select a month to view Borneo sunrise and sunset times for the next 12 months.

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

Date	Sunrise times	Sunset times
Tuesday, 1st September 2026	06:09	18:23
Tuesday, 15th September 2026	06:06	18:15
Wednesday, 30th September 2026	06:04	18:08

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