Jakarta weather in September 2025

Expect 33°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Jakarta in September. Check more long-term weather averages for Jakarta in September before you book your next holiday to Indonesia in 2025/2026.

  • 33°C maximum daytime temperature in September in Jakarta33
    33°C max day temperature
  • 9 hours of sunshine per day
  • 8 days with some rainfall in September in Jakarta8
    8 days with some rainfall
  • 23°C minimum night-time temperature in September in Jakarta23
    23°C min night temperature
  • 12 hours of daylight per day in September in Jakarta12
    12 hours of daylight per day
  • Very high heat & humidity in September in JakartaVH
    Very High heat & humidity
  • 93 mm monthly rainfall in September in Jakarta93
    93 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Jakarta11
    11+ (Extreme) UV index
  • 29°C sea temperature in September in Jakarta29
    29°C sea temperature

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The September weather guide for Indonesia (Jakarta) 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.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Jakarta in September?

Daytime temperatures usually reach 33°C in Jakarta in September with very high heat and humidity, falling to 23°C at night.

How sunny is it in Jakarta in September?

There are normally 9 hours of bright sunshine each day in Jakarta in September - that's 71% of daylight hours.

How warm is the sea around Jakarta in September?

The average sea temperature around Jakarta in September is 29°C.

Does it rain in Jakarta in September?

There are usually 8 days with some rain in Jakarta in September and the average monthly rainfall is 93mm.

Jakarta September sunrise & sunset times

Browse the sunrise and sunset times for Jakarta in September 2025. Select a month to view Jakarta sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:53 17:53
Monday, 15th September 2025 05:46 17:50
Tuesday, 30th September 2025 05:38 17:47

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