Weather can make or break a road trip, so here's some data about year-round temperatures in Soloma to help you plan yours: The hottest months are usually April and March, with an average temperature of 15°C, while the coldest months are January and December, with an average of 13°C. The rainiest months in Soloma are June, September, August and July, with each month seeing an average of 548 mm of rainfall.