August 21 sees frequent showers in Hangzhou. Historical data shows a 40% chance of rain, so pack accordingly. Temperatures average 33°C. Expect a bustling atmosphere in Hangzhou right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Hangzhou
Currency
CNY
¥ Chinese yuan
Language
Chinese
Driving
Right side
Safety
Moderate Safety
GPI: 2.01
Hangzhou Weather Forecast for August 21
"Warm & Sunny. Expect average highs of 33.4°C. 40% chance of rain."
What to Wear in Hangzhou in August
Based on historical data for August 21, Hangzhou typically experiences temperatures between 25.6°C and 33.4°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 40% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Hangzhou
Smart Suitcase
- T-Shirt
- Light Clothing
- Umbrella
Average High
33.4°C
Daytime Peak
Average Low
25.6°C
Nighttime Low
Feels Like
47.7°C
🔥 Heat index effect
Rain Chance
40%
Avg 3.2mm if it rains
Cloud Cover
60%
Light drizzle
Pressure
1006.4 hPa
Low volatility
Hangzhou Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 88% 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 - 18:00
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
28.6°C
Humid/Sticky
Heat Index
47.7°C
Feels hotter
😣 Best outdoor time:
Early morning (6-9 AM) or evening (after 6 PM)
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in China
Flight Traffic
High
100/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~468
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Hangzhou
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:30
☀️ Noon
12:04
🌇 Sunset
18:37
⏱️ Daylight
13h 6m
Wind Speed
12.4 km/h
Gentle breeze
Sunshine
10.1 hrs
Direct Sun (Cloud-free)
Humidity
76%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Hangzhou
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 Hangzhou
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🔴 Very 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.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Hangzhou on August 21 averages 33.4°C with a 40% precipitation probability. Wedding/Outdoor Event Score: 84/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Hangzhou Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
August 17
33.6°C • 34% rain
Score
87
August 15
33.6°C • 35% rain
Score
86
August 16
33.6°C • 35% rain
Score
86
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (August 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Hangzhou Worth Visiting on August 21?
Planning a trip to Hangzhou on August 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 33.4°C with a 40% historical precipitation risk.
✈️ Travel Logistics: Approximately 468 landing slots available daily during this period, indicating peak tourist activity.
💉 Health Advisory: 10 vaccinations are recommended for China, including COVID-19.
📊 Historical Extremes: The hottest August 21 recorded in the last 30 years saw temperatures hit 38.5°C in 2022, while the coldest dropped to 24°C in 2019.