Xi'an in September
In September, Xi'an averages 26°C (78°F) during the day and 17°C (63°F) at night, with around 12 days of rain (128 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Plan for unsettled weather and bring rain gear.
September offers comfortable temperatures in Xi'an, with some rain to plan around.
How September compares to the rest of the year in Xi'an
September is in the middle of the year for warmth in Xi'an (5th of 12) and one of the wettest months (1st of 12). Daytime temperature runs 5°C above the annual average (20°C). September runs 6°C cooler than August (32°C) and cools 7°C in October (19°C).
September sunrise & sunset in Xi'an
Times shown for Xi'an local time (Asia/Shanghai), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Xi'an — September
Golden-hour and blue-hour windows for the 15th of September, in Xi'an's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Xi'an in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (High season) and Xi'an's popularity.
Crowds & pricing — September in Xi'an
This is a busy month in Xi'an — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — September in Xi'an
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Xi'an in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 7°C / 44°F | -3°C / 26°F | 10 mm | 3 | — |
| February | 10°C / 50°F | -1°C / 30°F | 18 mm | 4 | — |
| March | 18°C / 64°F | 5°C / 42°F | 28 mm | 6 | — |
| April | 22°C / 72°F | 11°C / 51°F | 59 mm | 10 | — |
| May | 27°C / 81°F | 15°C / 60°F | 56 mm | 7 | — |
| June | 31°C / 88°F | 20°C / 69°F | 97 mm | 9 | — |
| July | 33°C / 92°F | 23°C / 73°F | 94 mm | 9 | — |
| August | 32°C / 89°F | 22°C / 72°F | 110 mm | 10 | — |
| September | 26°C / 78°F | 17°C / 63°F | 128 mm | 12 | — |
| October | 19°C / 66°F | 10°C / 51°F | 73 mm | 10 | — |
| November | 13°C / 56°F | 4°C / 38°F | 28 mm | 6 | — |
| December | 7°C / 45°F | -3°C / 27°F | 7 mm | 2 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Xi'an in September →
Frequently asked questions
How hot is Xi'an in September?
In September, Xi'an averages a high of 26°C (78°F) and a low of 17°C (63°F) — generally warm.
Does it rain a lot in Xi'an in September?
September can be fairly wet in Xi'an, with about 12 rainy days on average.
Is September a good time to visit Xi'an?
September is warm. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Xi'an in September?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full September packing list for Xi'an for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.