Planning for the weather is a good way to make your trip to Ambon relaxing and enjoyable, especially when you’re splurging. The hottest months are usually January and December, with an average temperature of 28°C, while the coldest months are August and July, with an average of 26°C. The rainiest months in Ambon are May, June, July and April, with each month seeing an average of 350 mm of rainfall.