On Esperanza, the main indicator of the switch between the Amihan and Habagat seasonal patterns is the switch in wind direction. In most years this transition is abrupt and occurs overnight. In some years there is a period of perhaps a week or two where the wind will switch between Amihan and Habagat patterns several times before settling into the pattern for the new season. As a rule of thumb, Labangtatay will be in the Habagat weather pattern from sometime in September or October to sometime in May or June and in the Amihan weather pattern for the remainder of the year. These dates can vary in individual years, though.