what's the weather in osaka?
What's the best time to go to Osaka in Japan? Here are some annual weather facts we collected from our historical weather data: The months May, June, July, September and October have nice weather with a good average temperature. On average, the warmest month(s) are July and August. A lot of rain (rainy season) falls in the months: March, April, May, June, July, August, September and October. On average, the warmest month is August.