If you're looking for summer vibes, the best time to travel to Okinawa is in June, July and August, when the average temperature reaches 28.75 °C, while July, August and October are the 3 sunniest months of the year, with an average of 38.56 hours.
If you prefer colder temperatures, however, make sure you visit Okinawa during the months of January, February and March to experience an average of 17.03 °C.
For those who don't care too much about temperatures, but want to avoid getting wet in the rain, it's important to avoid travelling during March, April and July, when the average precipitation in Okinawa is 7.5 mm, while the months of January, February and March are drier, with an average of 0 mm.