Sison is a city of approximately 9,300 people in Ilocos, Philippines. Located in the Asia/Manila time zone at 16.2°N latitude.
In 2025, Sison recorded an average annual temperature of 80°F. The hottest temperatures reached 99°F in April; the coolest were 67°F in January. Total precipitation for the year was 114 inches, with the wettest month being July.
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