Weather can make or break a roadtrip, so we've gathered some data about year-round temperatures in Okaba to help you plan yours. The hottest months are usually November and December with an average temp of 82°F, while the coldest months are August and July with an average of 78°F. The rainiest months in Okaba are March, January, February, and April, with each month seeing an average of 13 inches of rainfall.