Adelaide, Australia — Weather in September 2026

Climate Overview

Adelaide, Australia in September has mild conditions, with highs averaging 16.9°C (62°F) and noticeably cooler mornings. Winds are noticeable. Sea temperature stays cool at 15°C (59°F).

This month falls at the beginning of Spring.

Temperatures remain fairly steady throughout September, with daily highs around 17°C (63°F).

September sees fairly even rainfall, totalling about 45 mm across the month.

Expect around 9.6h of sunshine at the start of September, increasing to 10.2h by the end.

The warmest days tend to fall around the 30th, averaging 18.1°C (65°F).

Compared to August, this month is about 2°C warmer with 2 fewer rainy days. Temperatures will rise further into October.

Monthly September Averages

Temperature

17°C / 10°C

Feels Like

15°C / 7°C

Rain

8 days · 45 mm

Sunshine

9.9h / day

Humidity

70% — Humid

Wind

26 km/h

Wind Direction

W (262°)

Gusts

41 km/h

Daylight

11.9 h

Cloud Cover

48%

Clear Sky Days

4.6

UV Index

5.8 — High

Sea Temperature

15°C

Dew Point

8°C — Dry

Moon Phase

Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

HighLow

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 06:17

Daylight 11.8h

Sunset 18:08

Compare Months

2days (13 mm) Excellent

3days (14 mm) Excellent

3days (19 mm) Excellent

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January best	28°C / 18°C	28°C / 16°C	4days (25 mm) Good	12.1h Excellent	55% Moderate	8.8 Very High	Excellent	View Details
February best	27°C / 17°C	27°C / 16°C	2days (13 mm) Excellent	11.5h Excellent	56% Moderate	8.5 Very High	Excellent	View Details
March best	26°C / 16°C	25°C / 15°C	3days (14 mm) Excellent	10.7h Excellent	60% Moderate	7 High	Excellent	View Details
April	22°C / 14°C	20°C / 12°C	5days (25 mm) Good	9.2h Good	64% Muggy	5.1 High	Excellent	View Details
May	17°C / 11°C	15°C / 8°C	7days (44 mm) Good	8.3h Good	71% Muggy	3.6 Moderate	Good	View Details
June	15°C / 9°C	12°C / 6°C	9days (55 mm) Wet	7.5h Good	77% Humid	2.8 Moderate	Fair	View Details
July	14°C / 9°C	11°C / 5°C	10days (59 mm) Wet	7.8h Good	78% Humid	3 Moderate	Fair	View Details
August	15°C / 9°C	12°C / 6°C	10days (59 mm) Wet	8.7h Good	75% Muggy	4.2 Moderate	Fair	View Details
September	17°C / 10°C	15°C / 7°C	8days (45 mm) Wet	9.9h Good	70% Muggy	5.8 High	Good	View Details
October	20°C / 12°C	18°C / 9°C	7days (42 mm) Good	10.7h Excellent	65% Muggy	7.1 Very High	Good	View Details
November	23°C / 14°C	21°C / 11°C	7days (38 mm) Good	11.7h Excellent	62% Muggy	7.8 Very High	Good	View Details
December best	26°C / 16°C	25°C / 14°C	3days (19 mm) Excellent	12.3h Excellent	56% Moderate	8.7 Very High	Excellent	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 jacketUmbrellaWindbreakerComfortable walking shoes

Frequently Asked Questions

Expand all

Is September a good time to visit Adelaide?

September is typically good for visiting Adelaide, with average highs of 17°C (62°F) and around 8 rainy days. Adelaide, Australia in September has mild conditions, with highs averaging 16.9°C (62°F) and noticeably cooler mornings.

Does it rain a lot in Adelaide in September?

Adelaide typically sees around 8 rainy days in September with 45 mm (1.8 in) of total rainfall. An umbrella should suffice.

Does it get cold at night in Adelaide in September?

Nights in Adelaide during September are cool at around 10°C (50°F). Bring a jacket or sweater for evenings.

What should I pack for Adelaide in September?

With highs of 17°C (62°F) and lows of 10°C (50°F) in September, we recommend: Layered clothing, Light jacket, Umbrella, Windbreaker, Comfortable walking shoes. Comfortable walking shoes are essential.

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

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

What is the UV index in Adelaide in September?

The average UV index in Adelaide during September is 6 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.

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

Adelaide gets approximately 12 hours of daylight per day in September, with around 10 hours of sunshine.

Does it snow in Adelaide in September?

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

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