Planning for the weather is a good way to make your trip to Honiara relaxing and enjoyable, especially when you’re splurging. The hottest months are usually May and November, with an average temperature of 27°C, while the coldest months are August and July, with an average of 26°C. The rainiest months in Honiara are March, December, January and February, with each month seeing an average of 424 mm of rainfall.