Papua New Guinea weather in September 2025

Expect 30°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Papua New Guinea in September. Check more long-term weather averages for Papua New Guinea in September before you book your next holiday to Papua New Guinea in 2025/2026.

  • 30°C maximum daytime temperature in September in Papua New Guinea (Port Moresby)30
    30°C max day temperature
  • 7 hours of sunshine per day
  • 7 days with some rainfall in September in Papua New Guinea (Port Moresby)7
    7 days with some rainfall
  • 22°C minimum night-time temperature in September in Papua New Guinea (Port Moresby)22
    22°C min night temperature
  • 12 hours of daylight per day in September in Papua New Guinea (Port Moresby)12
    12 hours of daylight per day
  • High heat & humidity in September in Papua New Guinea (Port Moresby)H
    High heat & humidity
  • 82 mm monthly rainfall in September in Papua New Guinea (Port Moresby)82
    82 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Papua New Guinea (Port Moresby)11
    11+ (Extreme) UV index
  • 25°C sea temperature in September in Papua New Guinea (Port Moresby)25
    25°C sea temperature

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The September weather guide for Papua New Guinea (Port Moresby) 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.

Top Papua New Guinea destinations

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

All Papua New Guinea destinations

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

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How hot is it in Papua New Guinea in September?

Daytime temperatures usually reach 30°C in Port Moresby, Papua New Guinea in September with high heat and humidity, falling to 22°C at night.

How sunny is it in Papua New Guinea in September?

There are normally 7 hours of bright sunshine each day in Port Moresby, Papua New Guinea in September - that's 56% of daylight hours.

How warm is the sea around Papua New Guinea in September?

The average sea temperature around Port Moresby, Papua New Guinea in September is 25°C.

Does it rain in Papua New Guinea in September?

There are usually 7 days with some rain in Port Moresby, Papua New Guinea in September and the average monthly rainfall is 82mm.

Papua New Guinea September sunrise & sunset times

Browse the sunrise and sunset times for Papua New Guinea in September 2025. Select a month to view Papua New Guinea sunrise and sunset times for the next 12 months. The Papua New Guinea sunrise and sunset times shown below are for Port Moresby.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:14 18:09
Monday, 15th September 2025 06:05 18:08
Tuesday, 30th September 2025 05:56 18:07

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