May 31 sees frequent showers in Hong Kong. Historical data shows a 61% chance of rain, so pack accordingly. Temperatures average 29°C. You'll enjoy Hong Kong with reasonable crowd levels and competitive accommodation options. Note: May 31 is Dragon Boat Festival in Hong Kong, so expect special events, closures, and festive atmosphere.
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Essential Travel Info for Hong Kong
Currency
HKD
$ Hong Kong dollar
Language
English
+1 more
Driving
Left side
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Hong Kong Weather Forecast for May 31
"Rainy & Overcast. Expect average highs of 28.9°C. 61% chance of rain."
What to Wear in Hong Kong in May
Based on historical data for May 31, Hong Kong typically experiences temperatures between 25.4°C and 28.9°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 61% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Hong Kong
Smart Suitcase
- T-Shirt
- Light Clothing
- Umbrella
Average High
28.9°C
Daytime Peak
Average Low
25.4°C
Nighttime Low
Feels Like
36.3°C
🔥 Heat index effect
Rain Chance
61%
Avg 6.2mm if it rains
Cloud Cover
81%
Moderate rain
Pressure
1007 hPa
Low volatility
Hong Kong Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 96% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 19:00
Type I-II
🔴 18 min to burn
Type III-IV
🟡 27 min to burn
Type V-VI
🟢 45 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
26.7°C
Humid/Sticky
Heat Index
36.3°C
Feels hotter
😕 Best outdoor time:
Morning hours (before 11 AM)
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Holiday
Dragon Boat Festival
Flight Traffic
Moderate
43/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~492
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Hong Kong
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:40
☀️ Noon
12:22
🌇 Sunset
19:04
⏱️ Daylight
13h 23m
Wind Speed
16.2 km/h
Gentle breeze
Sunshine
8.3 hrs
Direct Sun (Cloud-free)
Humidity
88%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Hong Kong
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 Hong Kong
Travel Comfort Index
Real-time tourism conditions
Weather Quality
🌧️ Variable
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Mild discomfort possible for arthritic conditions.
Moderate fish activity expected.
Unhealthy. Everyone should reduce outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
Typhoon Risk
Year-round risk present
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Hong Kong on May 31 averages 28.9°C with a 61% precipitation probability. Wedding/Outdoor Event Score: 64/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Hong Kong Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
May 26
28.2°C • 58% rain
Score
70
May 24
28°C • 60% rain
Score
69
May 25
28°C • 60% rain
Score
69
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (May 31) in other destinations
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📍 Is Hong Kong Worth Visiting on May 31?
Planning a trip to Hong Kong on May 31? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 28.9°C with a 61% historical precipitation risk.
🎉 Local Event: The date coincides with Dragon Boat Festival, which may influence local business hours and event availability.
✈️ Travel Logistics: Approximately 492 landing slots available daily during this period, indicating peak tourist activity.
🌊 Coastal Conditions: Water temperature averages 27.6°C (tropical bath). Wave conditions are generally fun waves with heights around 0.71m.
📊 Historical Extremes: The hottest May 31 recorded in the last 30 years saw temperatures hit 31.3°C in 2023, while the coldest dropped to 24.1°C in 2025.