Planning for the weather is a good way to make your trip to Ota relaxing and enjoyable, especially when you’re splurging. The hottest months are usually August and July with an average temp of 76°F, while the coldest months are January and February with an average of 41°F. The rainiest months in Ota are July, September, October, and June, with each month seeing an average of 8 inches of rainfall.