Planning for the weather is an important factor for making your trip to Khlong Lan a success, especially when you're splurging. The hottest months are usually April and March, with an average temperature of 29°C, while the coldest months are January and December, with an average of 24°C. The rainiest months in Khlong Lan are September, August, July and May, with each month seeing an average of 199 mm of rainfall.