Weather is probably a major factor when you plan your trip to Mertak, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually October and November, with an average temperature of 27°C, while the coldest months are August and July, with an average of 26°C. The rainiest months in Mertak are December, January, February and November, with each month seeing an average of 292 mm of rainfall.