Weather is probably a major factor when you plan your trip to Pekan, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually May and June, with an average temperature of 28°C, while the coldest months are January and February, with an average of 26°C. The rainiest months in Pekan are December, November, October and September, with each month seeing an average of 385 mm of rainfall.