Weather is probably a major factor when you plan your trip to Glan, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually March and April with an average temp of 80°F, while the coldest months are February and January with an average of 79°F. The rainiest months in Glan are June, May, July, and January, with each month seeing an average of 13 inches of rainfall.