If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Ota: The hottest months are usually January and February with an average temp of 83°F, while the coldest months are August and July with an average of 79°F. The rainiest months in Ota are June, July, September, and October, with each month seeing an average of 10 inches of rainfall.