Wellington, New Zealand skyline

Wellington Weather in September

Typical September weather in Wellington, New Zealand, based on 2006–2025 climate averages.

In September, Wellington averages a high of 12.9°C (55.2°F) and a low of 9.6°C (49.3°F), with about 12 rainy days (79 mm of rain) and 9.2 hours of sunshine a day.

Avg high

12.9°C (55.2°F)

Avg low

9.6°C (49.3°F)

Rainfall

79 mm (3.1 in)

Rainy days

12 days

Sunshine

9.2 h / day

Humidity

78%

September vs the rest of the year

Here is how every month in Wellington stacks up against September — the 5th driest month for rain.

MonthAvg highvs SeptemberRainRainy days
January18.8°C (65.8°F)+5.9°C (+10.6°F)51 mm8
February19°C (66.2°F)+6.1°C (+11°F)62 mm7
March17.8°C (64°F)+4.9°C (+8.8°F)64 mm9
April16.2°C (61.2°F)+3.3°C (+5.9°F)89 mm10
May14.4°C (57.9°F)+1.5°C (+2.7°F)89 mm11
June12.6°C (54.7°F)−0.3°C (−0.5°F)101 mm13
July11.8°C (53.2°F)−1.1°C (−2°F)101 mm12
August11.9°C (53.4°F)−1°C (−1.8°F)94 mm14
September12.9°C (55.2°F)—79 mm12
October14.1°C (57.4°F)+1.2°C (+2.2°F)87 mm13
November15.7°C (60.3°F)+2.8°C (+5°F)71 mm10
December17.4°C (63.3°F)+4.5°C (+8.1°F)80 mm11

What September feels like in Wellington

September is early spring in Wellington (Wellington is in the southern hemisphere, so the seasons run opposite to Europe and North America). The daytime air has a chill to it, though it is rarely bitter. There is little difference between day and night: nights are cool, and evenings feel much like the afternoon. Damp air makes the cold feel rawer than the numbers alone suggest.

Rain in Wellington in September

It is a changeable month: rain comes about one day in 3, with dry spells in between. Each rainy day adds about 6.6 mm (0.3 in), a proper wetting rather than a sprinkle. The yearly figure is similar, around 7.4 mm per wet day.

Daylight and sunshine in September

In mid-September, sunrise is at about 6:24 am and sunset at about 6:09 pm (local time) — 11 h 45 min of daylight. The days are stretching out — 1 h 19 min more daylight than mid-August. The sun is out for roughly 78% of those daylight hours, so there are plenty of bright spells.

How September compares to the rest of the year

Ranked by average high, September comes out as the 4th coolest month in Wellington. Against August, the average high is 1°C (1.8°F) higher, with 15 mm less rain. The warm-up continues into October. October averages a high of 14.1°C (57.4°F).

Who September suits

  • Sightseeing: a good fit — comfortable enough to explore on foot all day.
  • Parks & outdoor: less ideal — too cool to sit outside for long.
  • Beach: less ideal — the sea air is too cool.

Tips for visiting Wellington in September

Rain Protection

A compact umbrella and a light waterproof jacket.

Light Jacket

Bring a sweater or light coat for cool afternoons.

Sunglasses

Plenty of sun, so bring sunglasses and a cap.

Quick questions

How warm is Wellington in September?

Expect around 12.9°C (55.2°F) in the afternoon and 9.6°C (49.3°F) at night, which most visitors would call chilly.

Does it rain a lot in Wellington in September?

Yes, fairly — rain falls about one day in 3 and totals about 79 mm, so an umbrella is worth carrying.

What should I wear in Wellington in September?

The numbers point to rain protection, a light jacket and sunglasses. There is little need to change for the evening.

Is September or October better for visiting Wellington?

On our 12-month climate ranking, September comes out ahead (#8 of 12 vs #9). October is warmer and has more rainy days.

Is September a good time to visit Wellington?

Good

Good — mild but cool days, frequent rain (about 12 rainy days), plenty of sunshine (9.2 h a day). Within Wellington's own year, September ranks #8 of 12.

September in other New Zealand cities

Warmer or drier places in September

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Monthly averages from 20 years of Open-Meteo history (2006–2025), not a forecast — see all 12 months in Wellington weather by month.