Adelaide Weather in December

December in Adelaide typically sees daytime highs of 25°C (77°F) and nighttime lows of 14°C (57°F). Expect some rainfall during the month. It falls within the summer season.

Rainfall in Adelaide in December

Climate statistics over the past 30 years suggest around 6 days of rain, with 29 mm (1.1 in) average for the month. The occasional light shower is possible, but rain is rarely an issue this month.

Temperature in Adelaide in December

If you're visiting Adelaide in December, expect perfect temperatures with highs of 25°C (77°F) and overnight lows of 14°C (57°F). December is a notable month of the summer season. Overall, the month follows a fairly predictable daily temperature pattern. With lows of 14°C (57°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Adelaide in December

Enjoy a sunny month with about 294 hours of sunshine, the clear skies make Adelaide even more beautiful.

Wind Speed in Adelaide in December

Average wind conditions reach 5 m/s (10 knots) in December. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.

Average water temperature in December

At 22°C (72°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March, April, October, November and December typically offer the best weather for Adelaide.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Australia, check out our Adelaide's climate page.

Adelaide Temperature in December

Min Temperature 14°C (57°F)  

Max Temperature 25°C (77°F)  

Water Temperature 22°C (72°F)  

Chance of Rain 20%  

Precipitation 29 mm (1.1 in)  

Rainy days 6 days  

Humidity 39%  

Windspeed 5 m/s (10 knots)  

Sunshine 294 hours  

Percentage Sunshine 54%  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Adelaide typically rise from around 24°C (75°F) at the start of December to approximately 27°C (81°F) by the end. Nights are pleasant, with lows typically ranging from 13°C (55°F) to 16°C (61°F).

Average temperatures in December

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in December

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Historical weather for Adelaide in December

Browse day-by-day weather records for Adelaide spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Adelaide historical weather extremes in December

Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Adelaide.

• The warmest day in December was on December 19, 2019, with a maximum of 43°C (109°F).
• The coldest December day was on December 10, 2023, with a maximum of 15°C (59°F).
• Nighttime temperatures dropped to 7°C (45°F) on December 2, 2015, marking the coldest December night on record.

What to Wear in Adelaide in December

Comfortable temperatures call for an easy wardrobe in December. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Light rain is possible, so consider bringing a small umbrella or rain jacket. Expect water temperatures of around 22°C (72°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Adelaide in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

10/10

Walking

10/10

Barbeque

10/10

Camping

10/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Australia, check out our Adelaide's climate page.

More climate data for Adelaide

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Adelaide climate overview or explore weather in Australia.