September weather forecast
Lanzhou, China

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Weather in September

September marks the transition from summer to autumn in Lanzhou. Torrential rain from August dwindles to 52mm (2.05"), showing a decline in the monsoonal intensity. An evident drop in temperatures indicates shorter, cooler days ahead. City views from the Lanshan Park during September display a myriad of colors, reflecting the mood of the impending autumn. September ushers a season change with its temperate climate and reduced rainfall.

Temperature

The arrival of September signals a shift in temperature, down from a moderately hot 26°C (78.8°F) in August to an agreeable 21°C (69.8°F). An average low-temperature of 10°C (50°F) is observed during September nights in Lanzhou.

Rainfall

In Lanzhou, during September, the rain falls for 13 days and regularly aggregates up to 52mm (2.05") of precipitation. Throughout the year, in Lanzhou, there are 87 rainfall days, and 350mm (13.78") of precipitation is accumulated.

Daylight

In Lanzhou, China, the average length of the day in September is 12h and 25min.
On the first day of September, sunrise is at 06:36 and sunset at 19:32. On the last day of the month, sunrise is at 06:59 and sunset at 18:50 CST.

Sunshine

January, September through December, with an average of 6h of sunshine, are months with the least sunshine in Lanzhou.

UV index

The average daily maximum UV index in September is 8. A UV Index reading of 8 to 10 represents a very high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In September, the maximum UV index of 8 suggests this advice:
Be vigilant. Without due care, eyes and skin can be harmed in no time. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
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Frequently asked questions

What is the temperature in September in Lanzhou?

In September, the average high-temperature and low-temperature in Lanzhou, China, are 21°C (69.8°F) and 10°C (50°F) respectively.

How many days does it rain in September in Lanzhou?

In Lanzhou, in September, it is raining for 13 days, with typically 52mm (2.05") of accumulated precipitation.

How many hours of daylight does Lanzhou have in September?

The average day length in September is 12h and 25min.

When are sunrise and sunset in September in Lanzhou?

On the first day of September, sunrise is at 06:36 and sunset at 19:32. On the last day of the month, sunrise is at 06:59 and sunset at 18:50 CST.

What are the months with the least sunshine in Lanzhou?

The months with the least sunshine are January, September through December, with an average of 6h of sunshine.

How many hours of sunshine does Lanzhou have in September?

In September, the average sunshine duration in Lanzhou, China, is 6h.

How high is the UV index in September in Lanzhou?

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

Average temperature in September
Lanzhou, China

Average temperature in September - Lanzhou, China
  • Average high temperature in September: 21°C

The warmest month (with the highest average high temperature) is July (27°C).
The month with the lowest average high temperature is January (1°C).

  • Average low temperature in September: 10°C

The month with the highest average low temperature is July (15°C).
The coldest month (with the lowest average low temperature) is January (-12°C).

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Average rainfall in September
Lanzhou, China

Average rainfall in September - Lanzhou, China
  • Average rainfall in September: 52mm

The wettest month (with the highest rainfall) is August (83mm).
The driest month (with the least rainfall) is December (1mm).

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Average rainfall days in September
Lanzhou, China

Average rainfall days in September - Lanzhou, China
  • Average rainfall days in September: 13 days

The months with the highest number of rainy days are July and September (13 days).
The month with the least rainy days is December (1 days).

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Average daylight in September /
Average sunshine in September
Lanzhou, China

Average daylight in September / Average sunshine in September - Lanzhou, China
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in September: 6h

The months with the most sunshine are April, May, June, July and August (Average sunshine: 8h).
The months with the least sunshine are January, September, October, November and December (Average sunshine: 6h).

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Average UV index in September
Lanzhou, China

Average UV index in September - Lanzhou, China
  • Average UV index in September: 8

The months with the highest UV index are June and July (UV index 12).
The month with the lowest UV index is December (UV index 2).

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Lanzhou, China

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