Cottesloe Weather in December
What's the weather like in Cottesloe (Western Australia) in December 2025?
The climate in Cottesloe during December can be summarized as warm and dry.
December is in the summer in Cottesloe and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 28°C (82°F), whilst at night 17°C (62°F) is normal.
| Daytime temperature | 27.5°C 81.5°F |
|---|---|
| Nightly temperature | 16.9°C 62.4°F |
| Average temperature | 22.2°C 72°F |
| Daily sunshine | 11.6 hrs |
| Avg rainfall | 11 mm 0.4 ins |
| Rainy days | 4 days |
| Sea temperature | 20.8°C 69.4°F |
| Humidity | 45% |
| Windspeed | 20.2kph 13 mph |
On average December is the 2nd driest month of the year in Cottesloe with around 11mm 0.4 inches of rain making it a dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.
On the flip side this corresponds to an average of 11.6 hours of sunshine per day.
December temperatures in Cottesloe
December rainfall
December hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Cottesloe in December 2025.
Other monthly averages
Best places to visit in December
Cottesloe weather stats
| Hottest month: | February | 30.1°C 86.2°F |
|---|---|---|
| Driest month: | January | 7mm 0.3ins |
| Sunniest month: | January | 12hrs |
| Coldest month: | July | 17.8°C 64°F |
| Wettest month: | June | 168mm 6.6ins |
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