September weather forecast
Xi'an, China

Weather in September

September, the first month of the autumn in Xi'an, is still a warm month, with temperature in the range of an average high of 25.3°C (77.5°F) and an average low of 15.9°C (60.6°F).

Temperature

In September, the average high-temperature decreases from a hot 30.8°C (87.4°F) in August to a warm 25.3°C (77.5°F). In September, in Xi'an, the average low-temperature is 15.9°C (60.6°F).

Humidity

The most humid month is September, with an average relative humidity of 79%.

Rainfall

In Xi'an, in September, during 10.9 rainfall days, 92mm (3.62") of precipitation is typically accumulated. In Xi'an, during the entire year, the rain falls for 90.3 days and collects up to 553mm (21.77") of precipitation.

Daylight

The average length of the day in September is 12h and 24min.
On the first day of September, sunrise is at 06:17 and sunset at 19:11. On the last day of the month, sunrise is at 06:37 and sunset at 18:30 CST.

Sunshine

In Xi'an, the average sunshine in September is 4.2h.

UV index

In September, the average daily maximum UV index in Xi'an is 8. A UV Index estimate of 8 to 10 represents a very high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 8 translate into the following recommendations:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Xi'an?

In Xi'an, China, in September, the average high-temperature is 25.3°C (77.5°F), and the average low-temperature is 15.9°C (60.6°F). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in August is calculated to be 39°C (102.2°F).

What is the most humid month in Xi'an?

September is the most humid month, with an average relative humidity of 79%.

What is the average humidity in September in Xi'an?

In Xi'an, the average relative humidity in September is 79%.

How much does it rain in Xi'an in September?

In Xi'an, during September, the rain falls for 10.9 days and regularly aggregates up to 92mm (3.62") of precipitation.

How many hours of daylight does Xi'an have in September?

In September, the average day length in Xi'an is 12h and 24min.

When are sunrise and sunset in September in Xi'an?

On the first day of September, sunrise is at 06:17 and sunset at 19:11. On the last day of the month, sunrise is at 06:37 and sunset at 18:30 CST.

How many hours of sunshine does Xi'an have in September?

In Xi'an, China, the average sunshine duration in September is 4.2h.

What is the UV index intensity in September in Xi'an?

In September, the average daily maximum UV index in Xi'an, China, is 8. A UV Index value of 8 to 10 symbolizes a very high health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average sunshine
Average UV index

Average temperature in September
Xi'an, China

Average temperature in September - Xi
  • Average high temperature in September: 25.3°C

The warmest month (with the highest average high temperature) is July (32.1°C).
The month with the lowest average high temperature is January (4.8°C).

  • Average low temperature in September: 15.9°C

The month with the highest average low temperature is July (21.9°C).
The coldest month (with the lowest average low temperature) is January (-3.8°C).

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Average humidity in September
Xi'an, China

Average humidity in September - Xi
  • Average humidity in September: 79%

The month with the highest relative humidity is September (79%).
The month with the lowest relative humidity is June (62%).

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Average rainfall in September
Xi'an, China

Average rainfall in September - Xi
  • Average rainfall in September: 91.6mm

The wettest month (with the highest rainfall) is July (98.6mm).
The driest month (with the least rainfall) is December (5.8mm).

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Average rainfall days in September
Xi'an, China

Average rainfall days in September - Xi
  • Average rainfall days in September: 10.9 days

The month with the highest number of rainy days is September (10.9 days).
The month with the least rainy days is December (3.4 days).

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Average daylight in September /
Average sunshine in September
Xi'an, China

Average daylight in September / Average sunshine in September - Xi
  • Average daylight in September: 12h and 24min

The month with the longest days is June (Average daylight: 14h and 25min).
The month with the shortest days is December (Average daylight: 9h and 55min).

  • Average sunshine in September: 4h and 12min

The month with the most sunshine is August (Average sunshine: 6h and 18min).
The month with the least sunshine is December (Average sunshine: 3h and 0min).

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Average UV index in September
Xi'an, China

Average UV index in September - Xi
  • Average UV index in September: 8

The months with the highest UV index are June and July (UV index 11).
The months with the lowest UV index are January and December (UV index 3).

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