What's the weather like in Lanzhou in July 7- 10/mid-October, what clothes to wear ... Thank you.

It's still hot from July to September, and short-sleeved trousers are ok.

The weather in September 9- 10/0 may be repeated and uncertain.

After the eleventh, I began to wear long sleeves and always bring a coat, just in case.

When it rains in summer, the temperature is a little lower, but it's ok, and short sleeves are also ok.

The main weather is dry.

Then the four seasons are very clear.

Everything else is similar.