New Zealand weather in September 2025

Expect 13°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in New Zealand in September. Check more long-term weather averages for New Zealand in September before you book your next holiday to New Zealand in 2025/2026.

  • 13°C maximum daytime temperature in September in New Zealand (Wellington)13
    13°C max day temperature
  • 5 hours of sunshine per day
  • 15 days with some rainfall in September in New Zealand (Wellington)15
    15 days with some rainfall
  • 7°C minimum night-time temperature in September in New Zealand (Wellington)7
    7°C min night temperature
  • 12 hours of daylight per day in September in New Zealand (Wellington)12
    12 hours of daylight per day
  • No heat & humidity in September in New Zealand (Wellington)0
    No heat & humidity
  • 104 mm monthly rainfall in September in New Zealand (Wellington)104
    104 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in New Zealand (Wellington)4
    4 (Moderate) UV index
  • 12°C sea temperature in September in New Zealand (Wellington)12
    12°C sea temperature

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The September weather guide for New Zealand (Wellington) 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 New Zealand destinations

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

All New Zealand destinations

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

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How warm is it in New Zealand in September?

Daytime temperatures usually reach 13°C in Wellington, New Zealand in September, falling to 7°C at night.

How sunny is it in New Zealand in September?

There are normally 5 hours of bright sunshine each day in Wellington, New Zealand in September - that's 42% of daylight hours.

How warm is the sea around New Zealand in September?

The average sea temperature around Wellington, New Zealand in September is 12°C.

Does it rain in New Zealand in September?

There are usually 15 days with some rain in Wellington, New Zealand in September and the average monthly rainfall is 104mm.

New Zealand September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:46 17:56
Monday, 15th September 2025 06:23 18:10
Tuesday, 30th September 2025 05:57 18:26

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