Weather is probably a major factor when you plan your trip to Old Bagan, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and May, with an average temperature of 31°C, while the coldest months are January and December, with an average of 24°C. The rainiest months in Old Bagan are September, August, October and July, with each month seeing an average of 176 mm of rainfall.