Weather will likely play an important role when you plan your trip to Maskelynes Islands, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and March with an average temp of 81°F, while the coldest months are August and September with an average of 76°F. The rainiest months in Maskelynes Islands are April, March, January, and February, with each month seeing an average of 11 inches of rainfall.