Adelaide Weather: Current Conditions and December Forecast for South Australia

Adelaide Experiences Typical Summer Weather Patterns

Adelaide, South Australia’s capital city, is currently experiencing characteristic summer weather conditions as December 2025 unfolds. Currently at 80°F (approximately 27°C), the city demonstrates the moderate temperatures typical of the region’s Mediterranean climate during this time of year. Understanding Adelaide’s weather patterns is crucial for residents planning outdoor activities, tourists visiting the city, and businesses dependent on weather conditions.

December Weather Characteristics and Current Conditions

Daytime temperatures usually reach 26°C in Adelaide in December with low heat and humidity, falling to 14°C at night. The city is experiencing partly cloudy conditions with the chance of a thunderstorm about the northern suburbs in the afternoon and evening. Weather observations show moderate wind conditions and comfortable humidity levels for outdoor activities.

There are normally 9 hours of bright sunshine each day in Adelaide in December, providing ample daylight for residents and visitors. There are usually 6 days with some rain in Adelaide in December and the average monthly rainfall is 27mm, indicating relatively dry conditions overall. The average sea temperature around Adelaide in December is 20°C, making it suitable for beach activities.

Outlook and Significance for Residents

The coming days will see continued variability in weather patterns. Very high chance of showers, most likely in the early morning, with winds varying throughout the day. Adelaide’s summer weather remains relatively mild compared to other Australian cities, making it an attractive destination for both residents and tourists during the festive season.

For Adelaide residents, these weather conditions are ideal for outdoor dining, beach visits, and summer festivals. The mild temperatures and low rainfall typical of December make this an excellent time for outdoor activities, though residents should remain prepared for occasional afternoon thunderstorms and changing conditions typical of South Australian summer weather.