Whanganui, New Zealand — Weather in September 2026

Climate Overview

Whanganui, New Zealand in September has mild conditions, with highs averaging 14.4°C (58°F) and noticeably cooler mornings. Rain falls on about 15 days this month, totalling around 111 mm. Winds are noticeable. Sea temperature stays cool at 13.4°C (56°F).

This month falls at the beginning of Spring.

Temperatures remain fairly steady throughout September, with daily highs around 15°C (59°F).

September sees fairly even rainfall, totalling about 112 mm across the month.

Expect around 8.1h of sunshine at the start of September, increasing to 9.4h by the end.

The warmest days tend to fall around the 21th, averaging 15.3°C (60°F).

Monthly September Averages

Temperature

14°C / 9°C

Feels Like

12°C / 6°C

Rain

15 days · 111 mm

Sunshine

8.9h / day

Humidity

80% — Very Humid

Wind

28 km/h

Wind Direction

NW (312°)

Gusts

54 km/h

Daylight

11.9 h

Cloud Cover

62%

Clear Sky Days

1.3

UV Index

4.8 — Moderate

Sea Temperature

13°C

Dew Point

9°C — Dry

Moon Phase

Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

High Low

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 06:22

Daylight 11.8h

Sunset 18:09

What to Expect

Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Wet weather can spread across much of the day, so it is best to keep outdoor plans flexible.

Recent yearly records for September have stayed close to the long-run average.

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January best	21°C / 15°C	22°C / 15°C	10days (79 mm) Wet	11.6h Excellent	79% Humid	7.9 Very High	Excellent	View Details
February best	22°C / 16°C	23°C / 15°C	7days (73 mm) Good	10.8h Excellent	78% Humid	7.5 Very High	Excellent	View Details
March best	20°C / 14°C	20°C / 13°C	9days (81 mm) Wet	9.6h Good	79% Humid	5.9 High	Excellent	View Details
April	18°C / 13°C	17°C / 11°C	10days (93 mm) Wet	8.6h Good	80% Humid	4.1 Moderate	Good	View Details
May	16°C / 11°C	14°C / 8°C	12days (97 mm) Wet	7.3h Good	81% Humid	2.7 Moderate	Good	View Details
June	14°C / 9°C	12°C / 6°C	13days (85 mm) Wet	6.6h Fair	83% Humid	2.3 Moderate	Fair	View Details
July	13°C / 8°C	10°C / 5°C	15days (118 mm) Wet	6.9h Fair	82% Humid	2.4 Moderate	Poor	View Details
August	13°C / 8°C	10°C / 5°C	15days (103 mm) Wet	7.9h Good	81% Humid	3.3 Moderate	Fair	View Details
September	14°C / 9°C	12°C / 6°C	15days (111 mm) Wet	8.9h Good	80% Humid	4.8 Moderate	Fair	View Details
October	16°C / 11°C	14°C / 8°C	14days (97 mm) Wet	10.1h Excellent	80% Humid	6.2 High	Good	View Details
November	18°C / 13°C	18°C / 11°C	13days (89 mm) Wet	11h Excellent	80% Humid	7 High	Good	View Details
December	20°C / 15°C	20°C / 13°C	13days (100 mm) Wet	11.5h Excellent	79% Humid	7.8 Very High	Good	View Details

What to Wear

Bundle up with a warm coat, scarf, and closed-toe shoes. Thermal layers underneath give flexibility between indoors and outdoors.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

Layered clothingLight jacketUmbrellaWaterproof jacketWaterproof shoes

Frequently Asked Questions

Expand all

Is September a good time to visit Whanganui?

September is typically fair for visiting Whanganui, with average highs of 14°C (58°F) and around 15 rainy days. Whanganui, New Zealand in September has mild conditions, with highs averaging 14.4°C (58°F) and noticeably cooler mornin

Does it rain a lot in Whanganui in September?

Whanganui typically sees around 15 rainy days in September with 111 mm (4.4 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Whanganui in September?

Nights in Whanganui during September are cool at around 9°C (49°F). Bring a jacket or sweater for evenings.

What should I pack for Whanganui in September?

With highs of 14°C (58°F) and lows of 9°C (49°F) in September, we recommend: Layered clothing, Light jacket, Umbrella, Waterproof jacket, Waterproof shoes. Comfortable walking shoes are essential.

Is September among the best months weather-wise in Whanganui?

September is not the most favourable month weather-wise in Whanganui. Consider visiting during months with milder temperatures or less rainfall for a better experience.

What is the UV index in Whanganui in September?

The average UV index in Whanganui during September is 5 (moderate). Sunscreen and sunglasses are recommended during midday hours.

How many hours of daylight are there in Whanganui in September?

Whanganui gets approximately 12 hours of daylight per day in September, with around 9 hours of sunshine.

Does it snow in Whanganui in September?

Snow is uncommon in Whanganui during September based on 10-year climate averages.

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