Weather can make or break a road trip, so here's some data about year-round temperatures in Tomarapi to help you plan yours: The hottest months are usually September and October, with an average temperature of 9°C, while the coldest months are July and June, with an average of 9°C. The rainiest months in Tomarapi are February, January, March and December, with each month seeing an average of 183 mm of rainfall.