The temperatures in Yunnan in September are comfortable with low of 14°C and and high up to 22°C.
You can expect rain for roughly half of the month of September in Yunnan. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Yunnan in September 2025.
If you’re planning to visit Yunnan in the near future, we highly recommend that you review the 14 day weather forecast for Yunnan before you arrive.