Weather is probably a major factor when you plan your trip to Samarinda, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually October and September, with an average temperature of 27°C, while the coldest months are July and January, with an average of 26°C. The rainiest months in Samarinda are April, March, November and December, with each month seeing an average of 345 mm of rainfall.