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 September and October, with an average temperature of 28°C, while the coldest months are March and July, with an average of 28°C. The rainiest months in Pohnpei are May, July, November and June, with each month seeing an average of 406 mm of rainfall.