Planning for the weather is a good way to make your trip to Pyin Oo Lwin relaxing and enjoyable, especially when you’re splurging. The hottest months are usually April and March, with an average temperature of 25°C, while the coldest months are January and December, with an average of 18°C. The rainiest months in Pyin Oo Lwin are August, July, June and September, with each month seeing an average of 445 mm of rainfall.