Alotau weather in September 2025

Expect 84°F daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Alotau in September. Check more long-term weather averages for Alotau in September before you book your next holiday to Papua New Guinea in 2025/2026.

  • 84°F maximum daytime temperature in September in Alotau84
    84°F max day temperature
  • 7 hours of sunshine per day
  • 14 days with some rainfall in September in Alotau14
    14 days with some rainfall
  • 72°F minimum night-time temperature in September in Alotau72
    72°F min night temperature
  • 12 hours of daylight per day in September in Alotau12
    12 hours of daylight per day
  • Moderate heat & humidity in September in AlotauM
    Moderate heat & humidity
  • 9.3 inches monthly rainfall in September in Alotau9.3
    9.3 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Alotau11
    11+ (Extreme) UV index
  • 79°F sea temperature in September in Alotau79
    79°F sea temperature

More about Alotau

Alotau by month

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

Recommended for Papua New Guinea

Wild Frontiers: Top deals on Papua New Guinea tours

  • Check out top deals on tours to Papua New Guinea
  • Explore places to visit & most popular itineraries
  • Filter deals by experience, duration, level & price
Go to Wild Frontiers deal >>

View all Wild Frontiers offers

Wild FrontiersTour deal finder

The September weather guide for Papua New Guinea (Alotau) 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)  |  Imperial (°F)

Back to top

How hot is it in Alotau in September?

Daytime temperatures usually reach 84°F in Alotau in September with moderate heat and humidity, falling to 72°F at night.

How sunny is it in Alotau in September?

There are normally 7 hours of bright sunshine each day in Alotau in September - that's 54% of daylight hours.

How warm is the sea around Alotau in September?

The average sea temperature around Alotau in September is 79°F.

Does it rain in Alotau in September?

There are usually 14 days with some rain in Alotau in September and the average monthly rainfall is 9.3 inches.

Alotau September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:01 17:56
Monday, 15th September 2025 05:52 17:55
Tuesday, 30th September 2025 05:43 17:54

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^