The weather in Osorno in August is very cold with temperatures between 3°C and 11°C, warm clothes are a must.
You can expect rain for roughly half of the month of August in Osorno. 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 Osorno in August 2025.
If you’re planning to visit Osorno in the near future, we highly recommend that you review the 14 day weather forecast for Osorno before you arrive.