You'll likely spend much of your trip indoors, but if you're planning to venture beyond the casino, taking a look at local weather data can help you. The hottest months are usually April and March, with an average temperature of 31°C, while the coldest months are January and December, with an average of 23°C. The rainiest months in Mandalay are August, October, September and July, with each month seeing an average of 204 mm of rainfall.