The best time to visit Osaka is from March to October.

Osaka’s climate is characterized to be a humid subtropical one with distinct, varied seasons. The winters are not very severe, summers are usually hot and humid and majority of the rainfall is received during the summer months only. The average annual temperature usually ranges around 16 – 17 degree Celsius, but undergoes large variations according to the seasons.

• Winter: December to February is the winter season and temperature is usually around 6 degree Celsius during these months. Snowfall can occur but is usually rare.
• Spring: Spring starts from March and lasts till May. The starting months are usually mild and comfortable, but the latter half starts getting humid and hot.
• Summers: Summers in Osaka are hot and because of increasing precipitation, the humidity levels also start rising. The temperature is usually around 26 – 27 degree Celsius, and this weather lasts from June till September.
• Autumn: In the months of October and November, there is a slight decrease in the temperature and precipitation levels also drop down. The temperature again becomes very comfortable at an average of 14 degree Celisius.

Summers are hot and humid, but bearable, while the perfect time to go if you are looking for the perfect weather conditions is the Spring and Autumn season.