December 18 is statistically one of the best days of the year in Perth. With minimal rain risk (3%) and pleasant highs of 28°C, it's ideal for outdoor adventures. As it's peak season for Perth, we recommend booking your stay well in advance to secure the best rates.
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Essential Travel Info for Perth
Currency
AUD
$ Australian dollar
Language
English
Driving
Left side
Safety
High Safety
GPI: 1.565
Perth Weather Forecast for December 18
"Warm & Sunny. Expect average highs of 28.3°C. 3% chance of rain."
What to Wear in Perth in December
Based on historical data for December 18, Perth typically experiences temperatures between 17.5°C and 28.3°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (3% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Perth
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
28.3°C
Daytime Peak
Average Low
17.5°C
Nighttime Low
Feels Like
29.2°C
🔥 Feels accurate
Rain Chance
3%
Avg 0.1mm if it rains
Cloud Cover
29%
Overcast
Pressure
1011.9 hPa
Low volatility
Perth Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 85% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 50+, limit exposure 10am-4pm
05:00 - 10:00
16:00 - 19:00
Type I-II
🔴 10 min to burn
Type III-IV
🟡 15 min to burn
Type V-VI
🟢 25 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
18.1°C
Noticeable
Heat Index
29.2°C
Feels hotter
🙂 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
⚠️ Mixed Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Australia
Flight Traffic
High
91/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~225
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Perth
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:07
☀️ Noon
12:14
🌇 Sunset
19:21
⏱️ Daylight
14h 13m
Wind Speed
29.6 km/h
Fresh breeze
Sunshine
12.9 hrs
Direct Sun (Cloud-free)
Humidity
54%
Comfortable
Travel Intelligence
Exclusive flight analytics & health data for Perth
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Perth
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Perth on December 18 averages 28.3°C with a 3% precipitation probability. Wedding/Outdoor Event Score: 95/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Perth Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (December 18) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Perth Worth Visiting on December 18?
Planning a trip to Perth on December 18? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 28.3°C with a 3% historical precipitation risk.
✈️ Travel Logistics: Approximately 225 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 23.3°C (swimming pool). Wave conditions are generally surfers only with heights around 1.23m.
📊 Historical Extremes: The hottest December 18 recorded in the last 30 years saw temperatures hit 31.6°C in 2022, while the coldest dropped to 13.7°C in 2017.