September 17 is generally a great time to visit Xi'an. While there is a slight chance of rain (39%), showers are usually brief. Expect comfortable 25°C weather. Xi'an is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Xi'an
Currency
CNY
¥ Chinese yuan
Language
Chinese
Driving
Right side
Connect
It's not very easy to make friends with ...
Safety
Moderate Safety
GPI: 2.01
Xi'an Weather Forecast for September 17
"Warm & Sunny. Expect average highs of 25.3°C. 39% chance of rain."
What to Wear in Xi'an in September
Based on historical data for September 17, Xi'an typically experiences temperatures between 17.2°C and 25.3°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 39% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Xi'an
Smart Suitcase
- T-Shirt
- Light Clothing
- Umbrella
Average High
25.3°C
Daytime Peak
Average Low
17.2°C
Nighttime Low
Feels Like
26.2°C
☀️ Feels accurate
Rain Chance
39%
Avg 3.7mm if it rains
Cloud Cover
63%
Overcast
Pressure
1013 hPa
Medium volatility
Xi'an Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 28 min to burn
Type III-IV
🟡 42 min to burn
Type V-VI
🟢 70 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
20.5°C
Humid/Sticky
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Morning hours (before 11 AM)
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in China
Flight Traffic
High
95/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~500
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Xi'an
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:29
☀️ Noon
12:40
🌇 Sunset
18:51
⏱️ Daylight
12h 21m
Wind Speed
9.2 km/h
Light breeze
Sunshine
6.6 hrs
Direct Sun (Cloud-free)
Humidity
75%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Xi'an
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 Xi'an
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
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.
Unhealthy. Everyone should reduce 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, Xi'an on September 17 averages 25.3°C with a 39% precipitation probability. Wedding/Outdoor Event Score: 90/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Xi'an Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
September 13
26.5°C • 23% rain
Score
98
September 10
27.2°C • 26% rain
Score
97
September 14
26.5°C • 24% rain
Score
97
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 17) in other destinations
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📍 Is Xi'an Worth Visiting on September 17?
Planning a trip to Xi'an on September 17? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 25.3°C with a 39% historical precipitation risk.
✈️ Travel Logistics: Approximately 500 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 September 17 recorded in the last 30 years saw temperatures hit 33.6°C in 2024, while the coldest dropped to 12.2°C in 2018.