Weather is probably a major factor when you plan your trip to Mirai, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and January, with an average temperature of 24°C, while the coldest months are July and June, with an average of 20°C. The rainiest months in Mirai are December, November, January and March, with each month seeing an average of 260 mm of rainfall.