Xi'an Weather in September
Season: Autumn
In short:
1. The weather of Xi’an in September is cool and pleasant overall for visiting.
2. Though Xi’an climate is a bit rainy this month, the rain usually stops quickly, especially in the first half month.
3. In addition, there are fewer tourists and travel costs drop, so September is one of the best months to visit Xi’an.
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| View of Xi'an in September with Perfect Weather |
Dropping Temperature
September marks the beginning of the autumn in Xi'an, when the weather becomes cooler and cooler. In general, the daily high temperature in early September may still remain around 30 degrees Celsius (86 degrees Fahrenheit). But, usually, it does not reach 35°C (95°F). The daily low is around 20°C (68°F). In conclusion, during this time period, you will only feel a bit hot in the midday, but warm and comfortable at other times. If there is wind and you stay in shady areas, you may not feel hot even in the midday. In the second half, the daily temperature usually ranges from 15-25°C (59-77°F), a completely cool level that is perfect for sightseeing. You should note that sometimes, the daily high may drop below 20°C (95°F), when you may need to add clothes accordingly.
However, it is worth mentioning that it was still very hot in early September 2024, when there were several days with the maximum temperature of 35°C (95°F) or above, and the extreme heat with highs of 39°C (102°F) still appeared. So, you are advised to always pay attention to the weather forecast.
Much Rain
Xi'an remains in its rainy season with an average of 11 rainy days and 92 mm of rainfall in September. In other words, Xi’an experiences frequent rain during this period. Besides, a temperature drop always comes along with an autumn rain.
In specific, the weather of Xi’an in the first half of September is more stable than in the second half. During the first half, there is rarely moderate or heavy rain, and the rain usually does not last long, so you can still go outdoors on these rainy days only if you don’t mind. However, in the second half, there may be more rainy days and moderate rain, and even torrential rain may occur, which will influence your outdoor visiting to a relatively large extent.
Daylight & Sunshine Hours
The length of the daytime varies a lot from the beginning to the end of the month: in the first a few days, the daylight hours can reach about 13 hours, but in the last a few days, the daylight hours are usually less than 12 hours. Therefore, if you plan to visit Xi’an in late September, you are recommended to make a more compact itinerary. Shorter daylight hours plus more rainy days make the sunshine hours of Xi’an this month decrease to about only 5 hours per day on average.
The UV index also decreases, which is about 8 on average. Though it is still a little high, you will not feel that the sun is very scorching.
Averages for Xi'an Weather in September
Temperature: 20°C /68°F
High Temperature: 25°C / 77°F
Low Temperature: 16°C / 61°F
Humidity: 79%
Rainfall: 92 mm
Rainy Days: 11 days
Sunrise: 06:17 ~ 06:38
Sunset: 18:30 ~ 19:10
Air Quality in September
Average AQI:59
Average AQI:59
Is September a Recommended Month to Visit Xi’an?
Yes, and September is one of the best months to visit Xi’an for the following seasons:
1. Normally, the temperature is mild and cool most of the time, quite comfortable for walking around and even hiking.
2. Though the climate of Xi’an in September is relatively rainy, the rain stops quickly and is light most of the time, especially in the first half month. Besides, the rain this month usually brings fresh air and cool but not muggy weather.
3. Except for the last a few days, most days have daylight hours over 12 hours. Besides, you will not experience extremely strong UV rays when visiting outdoor scenic spots on sunny days this month.
4. September is the shoulder season of Xi’an, because the summer vacation is just over and the long-period National Day Holiday has not yet come.
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Packing List for Xi’an Trip in September
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For early September: In the daytime, you are recommended to wear summer clothes like T-shirts and thin long pants. Girls can also wear dresses or skirts. In the cooler evening, you may need to put on shirts, and girls are better to change the dresses or skirts into long pants. For late September: T-shirts or long-sleeved T-shirts plus shirts are suitable for the mild daytime. In the early morning and at night, you are recommended to add thin jackets, which are also needed on cooler rainy days. As for pants, jeans and sweatpants should be prepared. Shoes: To guarantee that you have a comfortable and safe trip, you are advised to bring lightweight, non-slip, and waterproof hiking shoes or sneakers, since you may walk on a bit slippery roads after rain. Accessories: Sun protection items like hats, sunglasses, and sunscreen are needed on sunny days. In account of the frequent rain, be sure to bring umbrellas or raincoats.Advice for Xi’an Trip in September
The possibility of encountering rain this month is relatively high, so when planning the trip, you are recommended to have a plan B for rainy periods, like visiting indoor attractions instead of outdoor ones. As for sunny days, it is pleasant almost all the time. Therefore, you can organize your route exactly according to how you like it and how it is convenient, without worrying about the temperature.
Recommended Tours
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| Mt. Huashan, Xi'an in September |
Top 10 Things to Do in Xi'an
What to See in Xi’an in Autumn - 9 Best Destinations
Other Tips
1. Though September is a good time to travel to Xi’an, you are recommended to avoid the end of month. At this time of year, large numbers of tourists have arrived in Xi’an to spend their National Day holiday. In addition, in some years, Mid-Autumn Day also falls in this month, coming along with a three-day holiday, which is also advised to avoid.
2. Even in the shoulder season, on weekends, the Terracotta Army, the most popular attraction in Xi’an, can be crowded. Therefore, it is recommended that you visit it on weekdays. If you have decided to go on weekends, you’d better arrive early prior to the main crowds for a better and quieter travel experience.
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| Famous Terracotta Army |
3. On days with heavy rain, Mt. Huashan will be closed. If you plan to go there in rainy September in 2025, make sure to check the official real-time notification.
7-Day Xi'an Weather Forecast
What is the temperature in Xi'an in September?
High/Low Temperatures of Xi'an in September
Air Quality of Xi'an in September
Historical Xi'an Weather in September
| Sept | Temperature | Sunrise / Sunset | Humi- dity (%) | |
| High | Low | |||
| 1 | 28.4°C / 83.1°F | 15.8°C / 60.4°F | 06:17 / 19:10 | 47 |
| 2 | 24.4°C / 75.9°F | 17.2°C / 63.0°F | 06:18 / 19:09 | 68 |
| 3 | 29.0°C / 84.2°F | 16.5°C / 61.7°F | 06:19 / 19:08 | 70 |
| 4 | 32.1°C / 89.8°F | 16.6°C / 61.9°F | 06:19 / 19:06 | 57 |
| 5 | 32.3°C / 90.1°F | 17.8°C / 64.0°F | 06:20 / 19:05 | 63 |
| 6 | 33.6°C / 92.5°F | 20.0°C / 68.0°F | 06:21 / 19:04 | 42 |
| 7 | 30.5°C / 86.9°F | 22.2°C / 72.0°F | 06:21 / 19:02 | 55 |
| 8 | 27.8°C / 82.0°F | 21.2°C / 70.2°F | 06:22 / 19:01 | 67 |
| 9 | 22.8°C / 73.0°F | 15.9°C / 60.6°F | 06:23 / 18:59 | 86 |
| 10 | 22.2°C / 72.0°F | 15.5°C / 59.9°F | 06:24 / 18:58 | 72 |
| 11 | 27.9°C / 82.2°F | 14.0°C / 57.2°F | 06:24 / 18:57 | 67 |
| 12 | 28.7°C / 83.7°F | 15.3°C / 59.5°F | 06:25 / 18:55 | 62 |
| 13 | 26.9°C / 80.4°F | 17.6°C / 63.7°F | 06:26 / 18:54 | 66 |
| 14 | 29.2°C / 84.6°F | 17.8°C / 64.0°F | 06:26 / 18:52 | 63 |
| 15 | 26.1°C / 79.0°F | 18.4°C / 65.1°F | 06:27 / 18:51 | 68 |
| 16 | 24.9°C / 76.8°F | 19.4°C / 66.9°F | 06:28 / 18:49 | 79 |
| 17 | 26.5°C / 79.7°F | 18.9°C / 66.0°F | 06:28 / 18:48 | 73 |
| 18 | 23.8°C / 74.8°F | 20.1°C / 68.2°F | 06:29 / 18:47 | 78 |
| 19 | 24.1°C / 75.4°F | 18.2°C / 64.8°F | 06:30 / 18:45 | 76 |
| 20 | 23.7°C / 74.7°F | 20.7°C / 69.3°F | 06:31 / 18:44 | 78 |
| 21 | 31.7°C / 89.1°F | 20.5°C / 68.9°F | 06:31 / 18:42 | 67 |
| 22 | 27.2°C / 81.0°F | 20.6°C / 69.1°F | 06:32 / 18:41 | 73 |
| 23 | 24.7°C / 76.5°F | 19.6°C / 67.3°F | 06:33 / 18:39 | 86 |
| 24 | 21.3°C / 70.3°F | 15.3°C / 59.5°F | 06:33 / 18:38 | 63 |
| 25 | 19.4°C / 66.9°F | 17.3°C / 63.1°F | 06:34 / 18:37 | 79 |
| 26 | 17.4°C / 63.3°F | 12.6°C / 54.7°F | 06:35 / 18:35 | 86 |
| 27 | 12.6°C / 54.7°F | 10.2°C / 50.4°F | 06:36 / 18:34 | 89 |
| 28 | 14.0°C / 57.2°F | 11.1°C / 52.0°F | 06:36 / 18:32 | 91 |
| 29 | 19.8°C / 67.6°F | 12.6°C / 54.7°F | 06:37 / 18:31 | 78 |
| 30 | 25.0°C / 77.0°F | 11.4°C / 52.5°F | 06:38 / 18:30 | 77 |
- Last updated on Aug. 05, 2025 by Alex Jin -