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Province of Ilocos Sur

HBD GOV WEB

Climate

The Hernandez type of classification under PAGASA defines the climate of the province as generally arid (Type E) wherein there are more dry than wet months. At most, there are only 4 ½ wet months in a year with Q ranges from 1.00 to 1.67, where Q is the ratio of the number of dry months to the number of wet months. However, the southernmost portion of the province (part of the municipality of Cervantes) was observed to be humid (Type B), where rain is evenly distributed throughout the year with at most 3 dry months and the eastern part of Sugpon is dry (type D) with rain not sufficiently distributed with at most 6 dry months.

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