Adelaide, Australia — Weather in December 2026

Climate Overview

Adelaide, Australia in December has warm conditions, with highs averaging 25.8°C (78°F). Rain is rare, falling on about 3 days this month. Winds are noticeable. Temperatures drop noticeably between day and night. Sea temperature averages 21°C (70°F).

This month falls at the beginning of Summer.

Daily highs in December gradually rise from around 24°C (75°F) at the start to 28°C (82°F) by month's end.

December sees fairly even rainfall, totalling about 19 mm across the month.

The warmest days tend to fall around the 27th, averaging 28.3°C (83°F).

Compared to November, this month is about 3°C warmer with 4 fewer rainy days. Temperatures will rise further into January.

Monthly December Averages

Temperature

26°C / 16°C

Feels Like

25°C / 14°C

Rain

3 days · 19 mm

Sunshine

12.3h / day

Humidity

56% — Moderate

Wind

25 km/h

Wind Direction

S (174°)

Gusts

42 km/h

Daylight

14.5 h

Cloud Cover

39%

Clear Sky Days

9.7

UV Index

8.7 — Very High

Sea Temperature

21°C

Dew Point

12°C — Comfortable

Moon Phase

Waxing Crescent · 31%

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 05:57

Daylight 14.5h

Sunset 20:26

What to Expect

Daytime temperatures around 26°C (78°F) are ideal for full-day outdoor exploration.

Rain is uncommon in this month, so most days stay dry from morning through evening.

1 of the last 5 yearly records were warmer than this month's long-run average.

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

Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.

Packing List

Breathable clothingSunscreen (SPF 30+)Sun hatSunglassesComfortable walking shoes

Frequently Asked Questions

Expand all

Is December a good time to visit Adelaide?

December is typically excellent for visiting Adelaide, with average highs of 26°C (78°F) and around 3 rainy days. Adelaide, Australia in December has warm conditions, with highs averaging 25.8°C (78°F). Rain is rare, falling on about

Does it rain a lot in Adelaide in December?

Adelaide typically sees around 3 rainy days in December with 19 mm (0.7 in) of total rainfall. An umbrella should suffice.

Does it get cold at night in Adelaide in December?

Evenings in Adelaide during December are mild at 16°C (60°F). A light cardigan is usually enough.

What should I pack for Adelaide in December?

With highs of 26°C (78°F) and lows of 16°C (60°F) in December, we recommend: Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses, Comfortable walking shoes. Comfortable walking shoes are essential.

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

Yes, December offers some of the best weather conditions in Adelaide with comfortable temperatures and lower chances of rain.

What is the UV index in Adelaide in December?

The average UV index in Adelaide during December is 9 (very high). Strong sun protection is essential — SPF 50+, protective clothing, and avoid prolonged outdoor exposure during peak hours.

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

Adelaide gets approximately 15 hours of daylight per day in December, with around 12 hours of sunshine.

Does it snow in Adelaide in December?

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

Last updated: