You'll likely spend much of your trip indoors, but if you're planning to venture beyond the casino, taking a look at local weather data can help you. The hottest months are usually April and May, with an average temperature of 29°C, while the coldest months are August and February, with an average of 28°C. The rainiest months in Vaitupu are February, January, December and March, with each month seeing an average of 413 mm of rainfall.