Weather will likely play an important role when you plan your trip to Wirobrajan, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually October and May with an average temp of 78°F, while the coldest months are August and July with an average of 76°F. The rainiest months in Wirobrajan are November, December, February, and January, with each month seeing an average of 16 inches of rainfall.