Planning for the weather is a good way to make your trip to Kalaw relaxing and enjoyable, especially when you're splurging. The hottest months are usually April and March, with an average temperature of 22°C, while the coldest months are January and December, with an average of 18°C. The rainiest months in Kalaw are August, July, June and September, with each month seeing an average of 263 mm of rainfall.