Weather will likely play an important role when you plan your trip to Banjar, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually March and April, with an average temperature of 26°C, while the coldest months are August and September, with an average of 25°C. The rainiest months in Banjar are January, February, March and December, with each month seeing an average of 384 mm of rainfall.