Nias weather in September 2025

Expect 29°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Nias in September. Check more long-term weather averages for Nias in September before you book your next holiday to Indonesia in 2025/2026.

  • 29°C maximum daytime temperature in September in Nias29
    29°C max day temperature
  • 6 hours of sunshine per day
  • 13 days with some rainfall in September in Nias13
    13 days with some rainfall
  • 22°C minimum night-time temperature in September in Nias22
    22°C min night temperature
  • 12 hours of daylight per day in September in Nias12
    12 hours of daylight per day
  • High heat & humidity in September in NiasH
    High heat & humidity
  • 269 mm monthly rainfall in September in Nias269
    269 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Nias11
    11+ (Extreme) UV index
  • 29°C sea temperature in September in Nias29
    29°C sea temperature

More about Nias

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The September weather guide for Indonesia (Nias) 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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More about Indonesia

How hot is it in Nias in September?

Daytime temperatures usually reach 29°C in Nias in September with high heat and humidity, falling to 22°C at night.

How sunny is it in Nias in September?

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

How warm is the sea around Nias in September?

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

Does it rain in Nias in September?

There are usually 13 days with some rain in Nias in September and the average monthly rainfall is 269mm.

Nias September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:25 18:33
Monday, 15th September 2025 06:21 18:28
Tuesday, 30th September 2025 06:16 18:22

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