Western Australia weather

Our guide to the weather in Western Australia during December

34

Average high

8

UV Index

24mm

Monthly rainfall

21

Sea temperature

We've looked at the most up-to-date weather data for Western Australia, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Western Australia weather in December.

How hot is it in Western Australia during December?

The temperature reaches around 34℃ during the daytime in December, falling away to 21℃ at night. Remember that in December it's summer in the souther hemisphere! The UV index will be very high at this time of year, so you'll need to protect your eyes and skin. Avoid sun exposure between 10am and 4pm where possible. If outdoors, find shade, wear sun-protective clothing, wear UV-blocking sunglasses and generously apply broad spectrum SPF 30+ sunscreen every hour or so. Don't be fooled by cloudy skies! Remember that bright surfaces, such as water and sand will increase UV exposure.

Does it rain in Western Australia during December?

On average, in December you'll see rain on just one day in the month. In other words, you shouldn't see any of the wet stuff. There's a small chance that you'll catch a thunderstorm during your trip.

Is it windy in Western Australia during December?

Expect moderate breeze becoming stronger at times during December, with occasional gusts up to 19mph. With moderate humidity, any breeze will have a welcome cooling effect.

How warm is the sea in Western Australia during December?

The water temperature around Western Australia reaches a pleasant 21℃ during December. While generally considered warm, some people might find it a little on the cool side on entering the water. The hot air temperature will mean that you will feel comfortably warm when coming out of the water.

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Weather in Western Australia

Our month-by-month guide to the weather and climate in Western Australia

35.0

Western Australia weather in

January
33.5

Western Australia weather in

February
30.5

Western Australia weather in

March
26.8

Western Australia weather in

April
21.1

Western Australia weather in

May
17.7

Western Australia weather in

June
17.4

Western Australia weather in

July
19.7

Western Australia weather in

August
23.0

Western Australia weather in

September
28.1

Western Australia weather in

October
30.8

Western Australia weather in

November
33.7

Western Australia weather in

December