December 20 is statistically one of the best days of the year in Adelaide. With minimal rain risk (8%) and pleasant highs of 26°C, it's ideal for outdoor adventures. Expect a bustling atmosphere in Adelaide right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Adelaide
Currency
AUD
$ Australian dollar
Language
English
Driving
Left side
Connect
There is extensive free Wi-Fi access (po...
Safety
High Safety
GPI: 1.565
Adelaide Weather Forecast for December 20
"Warm & Sunny. Expect average highs of 26.1°C. 8% chance of rain."
What to Wear in Adelaide in December
Based on historical data for December 20, Adelaide typically experiences temperatures between 15.9°C and 26.1°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (8% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Adelaide
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
26.1°C
Daytime Peak
Average Low
15.9°C
Nighttime Low
Feels Like
26.5°C
☀️ Feels accurate
Rain Chance
8%
Avg 0.3mm if it rains
Cloud Cover
44%
Overcast
Pressure
1013.1 hPa
Medium volatility
Adelaide Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
~ Expect variable conditions. Have flexible plans and pack for multiple weather scenarios.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30+ required, seek shade
06:00 - 10:00
16:00 - 20:00
Type I-II
🔴 12 min to burn
Type III-IV
🟡 18 min to burn
Type V-VI
🟢 30 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
16.1°C
Noticeable
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Australia
Flight Traffic
High
100/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~145
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Adelaide
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:29
☀️ Noon
13:44
🌇 Sunset
20:59
⏱️ Daylight
14h 30m
Wind Speed
23.4 km/h
Moderate wind
Sunshine
12.3 hrs
Direct Sun (Cloud-free)
Humidity
54%
Comfortable
Travel Intelligence
Exclusive flight analytics & health data for Adelaide
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Adelaide
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Adelaide on December 20 averages 26.1°C with a 8% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Adelaide Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (December 20) in other destinations
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📍 Is Adelaide Worth Visiting on December 20?
Planning a trip to Adelaide on December 20? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 26.1°C with a 8% historical precipitation risk.
✈️ Travel Logistics: Approximately 145 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 6 vaccinations are recommended for Australia, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 21.3°C (swimming pool). Wave conditions are generally fun waves with heights around 0.67m.
📊 Historical Extremes: The hottest December 20 recorded in the last 30 years saw temperatures hit 41.4°C in 2019, while the coldest dropped to 11.8°C in 2023.