Xian weather in September
In September, Xian has an average high of 27 °C81 °F and an average low of 16 °C61 °F, with about 125 mm4.9 in of precipitation. It is the 5th warmest month of the year and the wettest.
How September compares with other months
Compared with August, September is 5.6 °C10.1 °F cooler on average and wetter by 11 mm0.4 in. Compared with October, September is 6.1 °C10.9 °F warmer on average and wetter by 65 mm2.6 in. Daylight lasts about 12.3 hours around the middle of the month. Average relative humidity is 69% and the average cloud amount 71%.
Is September a good time to visit Xian?
September is not among the most comfortable months by our comfort score: it is fairly wet (125 mm4.9 in). The most comfortable months in Xian are April and May and October.
What to wear in September
For Xian in September, pack light summer clothes such as T-shirts, shorts or light dresses, an extra layer for the cooler mornings and evenings and an umbrella or light rain jacket.
September in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Xian | 2781 | 1661 | 1254.9 |
| Weinan | 2882 | 1762 | 1244.9 |
| Tongchuan | 2577 | 1458 | 1174.6 |
| Tongchuanshi | 2475 | 1355 | 1114.4 |
| Shangluo | 2578 | 1458 | 1375.4 |
| Huayin | 2781 | 1662 | 1234.8 |
| Yongji | 2781 | 1661 | 1054.1 |
| Baoji | 2679 | 1660 | 1305.1 |
| Ankang | 2985 | 1865 | 1696.7 |
Nearby places that are more than 1 °C1.8 °F warmer in September: Ankang; cooler: Tongchuan, Tongchuanshi and Shangluo.
Other months in Xian
- January6 °C43 °F / −4 °C25 °F
- February11 °C51 °F / −1 °C30 °F
- March18 °C64 °F / 4 °C39 °F
- April25 °C76 °F / 10 °C50 °F
- May29 °C85 °F / 15 °C60 °F
- June34 °C93 °F / 20 °C69 °F
- July35 °C94 °F / 23 °C73 °F
- August33 °C91 °F / 22 °C71 °F
- September27 °C81 °F / 16 °C61 °F
- October21 °C70 °F / 10 °C50 °F
- November14 °C57 °F / 3 °C37 °F
- December7 °C45 °F / −3 °C27 °F
Frequently asked questions
How warm is Xian in September?
In September the average high in Xian is 27 °C (81 °F) and the average low is 16 °C (61 °F).
Does it rain a lot in Xian in September?
On average about 125 mm (4.9 in) of precipitation falls in September; it ranks 1st of the 12 months.
Is September the warmest month in Xian?
No. The warmest month in Xian is July, with an average high of 35 °C (94 °F). The coldest month is January, with an average low of -4 °C (25 °F).
How long is the day in Xian in September?
In the middle of September the day in Xian lasts about 12.3 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Xian in September?
The average relative humidity in September is about 69%. This is a long-term average for the whole day.
How cloudy is Xian in September?
On average about 71% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 593 m, while Xian lies at about 416 m. Temperatures on this page were therefore adjusted by +1.1 °C2.1 °F using the standard lapse rate of 6.5 °C per 1,000 m.