Planning for the weather is an important factor for making your trip to Sittee River a success, especially when you’re splurging. The hottest months are usually April and May, with an average temperature of 26°C, while the coldest months are January and December, with an average of 22°C. The rainiest months in Sittee River are June, October, September and August, with each month seeing an average of 178 mm of rainfall.