Planning for the weather is a good way to make your trip to Merauke relaxing and enjoyable, especially when you’re splurging. The hottest months are usually November and December with an average temp of 82°F, while the coldest months are August and July with an average of 78°F. The rainiest months in Merauke are March, January, February, and April, with each month seeing an average of 13 inches of rainfall.