July 31 is generally a great time to visit Perth. While there is a slight chance of rain (36%), showers are usually brief. Expect comfortable 17°C weather. Expect a bustling atmosphere in Perth right now—this is when the city truly comes alive with visitors.
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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 July 31
"Mild & Comfortable. Expect average highs of 17.3°C. 36% chance of rain."
What to Wear in Perth in July
Based on historical data for July 31, Perth typically experiences temperatures between 9.9°C and 17.3°C. We recommend packing light jacket, long pants, umbrella to stay comfortable. With a 36% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Perth
Smart Suitcase
- Light Jacket
- Long Pants
- Umbrella
Average High
17.3°C
Daytime Peak
Average Low
9.9°C
Nighttime Low
Feels Like
17.3°C
🌤️ Feels accurate
Rain Chance
36%
Avg 2.7mm if it rains
Cloud Cover
47%
Overcast
Pressure
1018.8 hPa
Medium volatility
Perth Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 93% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 160 min to burn
Type III-IV
🟡 240 min to burn
Type V-VI
🟢 400 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
13°C
Pleasant
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
❄️ Cold Water Hazard
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
~248
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Perth
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:07
☀️ Noon
12:24
🌇 Sunset
17:40
⏱️ Daylight
10h 32m
Wind Speed
24 km/h
Moderate wind
Sunshine
8.4 hrs
Direct Sun (Cloud-free)
Humidity
76%
Humid / Damp
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
⛅ Good
Tourist Crowds
🔴 Very 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
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Perth on July 31 averages 17.3°C with a 36% precipitation probability. Wedding/Outdoor Event Score: 82/100."
— 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
Better Alternatives Nearby
Consider these dates within ±7 days
August 5
17.1°C • 32% rain
Score
85
August 4
16.9°C • 32% rain
Score
84
August 6
17.2°C • 36% rain
Score
84
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (July 31) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Perth Worth Visiting on July 31?
Planning a trip to Perth on July 31? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 17.3°C with a 36% historical precipitation risk.
✈️ Travel Logistics: Approximately 248 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 16.5°C (polar plunge). Wave conditions are generally surfers only with heights around 1.94m.
📊 Historical Extremes: The hottest July 31 recorded in the last 30 years saw temperatures hit 20.7°C in 2024, while the coldest dropped to 6.2°C in 2025.