Port Moresby weather in September 2025

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

  • 30°C maximum daytime temperature in September in Port Moresby30
    30°C max day temperature
  • 7 hours of sunshine per day
  • 7 days with some rainfall in September in Port Moresby7
    7 days with some rainfall
  • 22°C minimum night-time temperature in September in Port Moresby22
    22°C min night temperature
  • 12 hours of daylight per day in September in Port Moresby12
    12 hours of daylight per day
  • High heat & humidity in September in Port MoresbyH
    High heat & humidity
  • 82 mm monthly rainfall in September in Port Moresby82
    82 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Port Moresby11
    11+ (Extreme) UV index
  • 25°C sea temperature in September in Port Moresby25
    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.

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

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How hot is it in Port Moresby in September?

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

How sunny is it in Port Moresby in September?

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

How warm is the sea around Port Moresby in September?

The average sea temperature around Port Moresby in September is 25°C.

Does it rain in Port Moresby in September?

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

Port Moresby September sunrise & sunset times

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

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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